As an Amazon Associate I earn from qualifying purchases.
Double window design:sending and mailing addresses can be clearly displayed Protects sensitive content and information for standard business and legal mailings, advertising campaigns, etc.
10 security double window envelope: pandri #10 envelope's dual window design allows for easy reading of the window's contents. Reducing the hassle of handwritten addresses. Order Now. This is the envelope you're looking for.

Long lasting supply; perfect for everyday business use, 500 envelope supply measuring 4-1/8 x 9-1/2, our envelopes are provided as an ultra long lasting, ideal for mass mailing and all business needs!. Quick-seal closure; our #10 envelopes are designed with an ultra strong self-SEAL adhesive strip to create a full, super secure seal across each envelope's width that won't easily open or tear, ideal for mailing for any letter sized and larger documents without splitting.
Double window security envelopes; tired of cheap paper envelopes that can be easily seen through? Our Double Window Security Envelopes are ultra secure and perfect for mailing invoices, statements, standard business & legal documents, with super strong SELF-SEAL strip and tinted security patterns.

Premium security tinted pattern: #10 security envelopes are designed with a premium security printed design to provide guaranteed privacy for your legal or business mail, offer the protection contents and sensitive information, a security tint makes envelopes hard to see through that ensures upmost privacy.
Click the Orange Button to order now. It's the perfect for secure business mailing, billing statements, invoices, checks, everyday home and other business mail. Double window envelope design: envelopes with dual window allows sender and recipient address to show through our unique 2 window, legal mailing, secure envelopes suitable for everyday business, and business billing statements while protecting sensitive contents and information. You can use business mailing envelopes for sending invoices and checks.

White woven paper, invoices, envelopes are strong and durable. High quality - made from 24 lb. 10 secure envelope is perfect for mailing checks, business correspondence, billing statements, and direct mail.
Security tinted - our #10 envelopes feature an interior security tint that ensures your content stays private during transit. 700 pack - 700 count per box is a cost-effective choice for small businesses, offices, and homes with frequent mailing needs. And ensures that you have enough mailing envelopes to last for a while.

Peel the paper strip from your Release & Seal envelope and press for permanent closure; no moisture required.

Offer the protection clients deserve; a blue security tint makes envelopes hard to see through; a security pattern scrambles the appearance of text. Columbian #10 double-window security envelopes have a specially designed, fold-away Redi-Seal flap that saves you time and money.

Provides complete business mail security: your invoices and statements will be completely hidden with our dark security tint design.
No need to spend time and money stamping, adding return labels, or spending extra money on custom envelopes, just quickly slide in your business mail to create professional looking business mail.

Save with self-stick: quality park #10 double-window security envelopes have a fold-away, self-sealing flap that saves you time & money.

Our security envelopes will quickly and easily create a strong seal for completely secure business mail. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker. Provides complete business mail security: your business mail will be completely hidden with our dark security tint design.

Protect your invoice and statement privacy. Strong adhesive: with the strong adhesive flap, valbox #10 double window envelopes will be more evident if tampered. Security invoice envelopes: forget the thin, try our valbox #10 security envelopes, which fit QuickBooks invoices, torn easily and see-through envelopes you used in the past, multiple business billing statements and return envelopes perfectly!!! The contents are also easy to slip in.
No need to worry about opening them easily by others. Great self seal envelopes. Notice: this #10 double window envelope is not for QuickBooks Checks!!! Double windows design: the windows line up perfectly with return and sender address, ideal for legal and standard business mailings, return documents and more. The self-seal feature makes these envelopes with windows much more convenient than regular, moisten-and-seal ones.
1. PANDRI
#ad
Number 10 Size 4 1/8 Inch X 9 1/2 Inch, Business Statements & Documents, 24 LB, PANDRI NO.10 Self-Seal Window Envelopes Designed for QuickBooks Invoices, 500#10 Double Window Security Envelopes
#adPANDRI #ad - It is perfect for secure business mail, invoices, bills, checks and other business mail. Safe inner grain: using the inner grain secrecy printing technology, the secure tone backing makes the envelope hard to see through and ensures the privacy of your invoices and statements under the light without any prying eyes.Double window design:sending and mailing addresses can be clearly displayed Protects sensitive content and information for standard business and legal mailings, advertising campaigns, etc.
More information #ad
Long lasting supply: with 500 #10 double window envelopes per box for long lasting supply, they are ideal for everyday business correspondence and large mailing tasks. Quick and easy to seal:designed with a super strong self-sealing adhesive strip that forms a complete, eliminating the need for glue sticks and licking envelopes, super secure seal across the width of each envelope, allowing for quicker and easier sending of more invoices, a huge time saver and perfect for mass mailing.110 security double window envelope: pandri #10 envelope's dual window design allows for easy reading of the window's contents. Reducing the hassle of handwritten addresses. Order Now. This is the envelope you're looking for.
Brand | PANDRI #ad |
Manufacturer | PANDRI #ad |
Part Number | ENVELOPES-500-2022 |
More information #ad
2. Aimoh
#ad
EnveGuard, Statements & Documents, Size 4-1/8 x 9-1/2 -White, 24 LB, 500 Count 30001, 500#10 Double Window SELF Seal Security Envelopes, for Invoices, Security Tinted
#adAimoh #ad - Dual window design; easily read dual windows for everyday business mailings to easily display postal addresses. Each envelope contains two front windows, a 1" x 3-1/2" top window positioned 1/2" from the left and 2-1/2" from the bottom and the bottom 1-1/8 X 4" window is 1/2" from the left and 3/4" from the bottom.Long lasting supply; perfect for everyday business use, 500 envelope supply measuring 4-1/8 x 9-1/2, our envelopes are provided as an ultra long lasting, ideal for mass mailing and all business needs!. Quick-seal closure; our #10 envelopes are designed with an ultra strong self-SEAL adhesive strip to create a full, super secure seal across each envelope's width that won't easily open or tear, ideal for mailing for any letter sized and larger documents without splitting.
More information #ad
Tinted security pattern; perfect for mailing invoices, our #10 Envelopes are printed with a secure tinted pattern, easily obscuring numbers and data for premium, standard business & legal documents and sensitive correspondence, statements, added security compared to other cheap envelopes. Double window security envelopes; tired of cheap paper envelopes that can be easily seen through? Our Double Window Security Envelopes are ultra secure and perfect for mailing invoices, statements, standard business & legal documents, with super strong SELF-SEAL strip and tinted security patterns.
Brand | Aimoh #ad |
Manufacturer | Aimoh #ad |
Part Number | 30001 |
Model | 30001 |
More information #ad
3. HERKKA
#ad
Number 10 Size 4-1/8 x 9-1/2, and Return Envelopes, White, 24 LB, Quickbooks Invoices, 500#10 Double Window Security Business Mailing Envelopes, Perfect Size for Multiple Business Statements
#adHERKKA #ad - 10 security envelopes:our #10 double window envelopes can easily read dual windows for everyday business mailings and postal addresses. Ultra strong easy seal: #10 envelopes are manufactured with ultra selF-SEAL adhesive strip to create a full, super secure seal across each envelope's width that won't easily open or tear, ideal for mailing larger documents without splitting, is guaranteed to stay sealed with no need for tape or glue sticks.Premium security tinted pattern: #10 security envelopes are designed with a premium security printed design to provide guaranteed privacy for your legal or business mail, offer the protection contents and sensitive information, a security tint makes envelopes hard to see through that ensures upmost privacy.
More information #ad
Long lasting supply: each box has 500 envelopes which can meet a long lasting supply, ideal for mass mailing of everyday business tasks! Our envelopes with smooth thick paper, it's fully compatible with most ink jet and laser printers, can print quick and easily without worry about paper jams. Click the Orange Button to order now. It's the perfect for secure business mailing, billing statements, invoices, checks, everyday home and other business mail. Double window envelope design: envelopes with dual window allows sender and recipient address to show through our unique 2 window, legal mailing, secure envelopes suitable for everyday business, and business billing statements while protecting sensitive contents and information. You can use business mailing envelopes for sending invoices and checks.
Brand | HERKKA #ad |
Manufacturer | HERKKA #ad |
Part Number | HERKKA |
Model | HERKKA |
More information #ad
4. SUNEE
#ad
White, 24LB, Size 4-1/8 x 9-1/2 Inches, Statements, 700 Pack #10 Double Window Envelopes Self-Seal, for Invoices, and Return Envelopes, No. 10 Security Envelopes
#adSUNEE #ad - Dual window design - each no. 10 envelope contains two front windows, a 1" x 3-1/2" top window positioned 1/2" from the left and 2-1/2" from the bottom and the bottom 1-1/8 X 4" window 1/2" from the left and 3/4" from the bottom.White woven paper, invoices, envelopes are strong and durable. High quality - made from 24 lb. 10 secure envelope is perfect for mailing checks, business correspondence, billing statements, and direct mail.
More information #ad
Easy to use - no more licking envelopes! our #10 double window envelopes feature a Peel & Seal closure STRONG ADHESIVE STRIP that requires no moisture, making it quick and easy to send your confidential documents securely. Security tinted - our #10 envelopes feature an interior security tint that ensures your content stays private during transit. 700 pack - 700 count per box is a cost-effective choice for small businesses, offices, and homes with frequent mailing needs. And ensures that you have enough mailing envelopes to last for a while.
Brand | SUNEE #ad |
Manufacturer | SUNEE #ad |
Weight | 7.5 Pounds |
Part Number | 69485 |
More information #ad
5. Columbian Envelopes
#ad
4-1/8 x 9-1/2 Inches, Self-Sealing, White, Columbian #10 Double-Window Security Envelopes, 250/Box COLO176, Statements and Legal Documents, for Invoices
#adColumbian Envelopes #ad - Paper with tinted privacy pattern to mask fine details; your data is safe from prying eyes, even if held to light. Double window envelopes display just the sender & receiver addresses; precise measurements keep sensitive information out of view.Peel the paper strip from your Release & Seal envelope and press for permanent closure; no moisture required.
More information #ad
Security-enhanced envelopes have 24 lb. Order this popular #10 size envelope well ahead and stay ready for bulk mailings; get 250 double-window envelopes per box. 10 double-window envelopes 4-1/8" x 9-1/2" are the perfect fit for business statements and invoices. Columbian no.Brand | Columbian Envelopes #ad |
Manufacturer | TOPS Products #ad |
Height | 4.3 Inches |
Length | 9.6 Inches |
Weight | 2.78 pounds |
Width | 7.3 Inches |
Part Number | COLO176 |
Model | COLO176 |
More information #ad
6. Columbian
#ad
White, 4-1/8" x 9-1/2", Invoices, For Business Statements, 24-lb, 500 Per Box COLO134, Columbian #10 Double-Window Self-Seal Security Envelopes
#adColumbian #ad - Redi-seal envelopes don’t require moisture, seal instantly and won't close and stick before you're ready; avoid the hassle and mess.Offer the protection clients deserve; a blue security tint makes envelopes hard to see through; a security pattern scrambles the appearance of text. Columbian #10 double-window security envelopes have a specially designed, fold-away Redi-Seal flap that saves you time and money.
More information #ad
Fits invoices and statements from QuickBooks and other standard business software; laser and inkjet printer compatible. A great value: get 500 white wove 4-1/8 inch x 9-1/2 inch #10 envelopes per box at a stock-up price.Brand | Columbian #ad |
Manufacturer | TOPS Products #ad |
Height | 4.21 Inches |
Length | 12.36 Inches |
Width | 9.92 Inches |
Part Number | COLO134 |
Model | COLO134 |
More information #ad
7. Blue Summit Supplies
#ad
Quickbooks Invoices, and Return Envelopes -Number 10 Size 4 1/8 X 9 ½ Inch, 500 No. 10 Flip and Seal Double Window Security Envelopes, Perfect Size for Multiple Business Statements
#adBlue Summit Supplies #ad - Your return and sender address will line up perfectly. Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope Design. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker.Provides complete business mail security: your invoices and statements will be completely hidden with our dark security tint design.
More information #ad
Perfect for mailing invoices, billing statements, checks, quickBooks Invoices, and other business mail. Save time with easy to use flip and seal self-seal design; With no need for licking or moistening, our self seal design allows for sending hundreds of invoices quickly and easily and is guaranteed to stay sealed with no need for tape or glue sticks. No need to spend time and money stamping, adding return labels, or spending extra money on custom envelopes, just quickly slide in your business mail to create professional looking business mail.
Brand | Blue Summit Supplies #ad |
Manufacturer | Blue Summit Supplies #ad |
Height | 0.01 Inches |
Length | 8 Inches |
Weight | 0.01 Pounds |
Width | 4 Inches |
Part Number | BSS-92588-008 |
Model | JE-Z02Z-X6NA |
More information #ad
8. Quality Park
#ad
Quality Park #10 Double-Window Self-Seal Security Envelopes, 500 Per Box QUA24559 24559, White, Invoices, For Business Statements, 24-lb, 4-1/8" x 9-1/2"
#adQuality Park #ad - An excellent value: get 500 white wove 4-1/8 inch x 9-1/2 inch #10 envelopes per box at a stock-up price. Formatted for business: double-windows display the sender & receiver addresses; fits invoices & statements from QuickBooks and other standard business software; laser and inkjet printer compatible.Save with self-stick: quality park #10 double-window security envelopes have a fold-away, self-sealing flap that saves you time & money.
More information #ad
Enhanced security: offer the protection clients deserve & protect yourself from liability; a security tint makes envelopes hard to see through; a security pattern scrambles the appearance of text. Haste, not waste: redi-seal envelopes don’t require moisture, seal instantly & won't close and stick before you're ready—that means you won't find ruined samples in the box.Brand | Quality Park #ad |
Manufacturer | Quality Park #ad |
Height | 4.13 Inches |
Length | 14 Inches |
Weight | 6.5 Pounds |
Width | 9.63 Inches |
Part Number | 24559 |
Model | 24559 |
More information #ad
9. Blue Summit Supplies
#ad
Perfect Size for Multiple Business Statements, Quickbooks Invoices, and Return Envelopes, Number 10 Size 4 1/8 Inch X 9 ½ Inch, 500 No. 10 Self Seal Double Window Security Envelopes
#adBlue Summit Supplies #ad - No need to spend time and money stamping, adding return labels, or spending extra money on custom envelopes, just quickly slide in your business mail to create professional looking business mail.Our security envelopes will quickly and easily create a strong seal for completely secure business mail. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker. Provides complete business mail security: your business mail will be completely hidden with our dark security tint design.
More information #ad
Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope Design. Just peel and seal for a strong lasting seal. Perfect for mailing invoices, QuickBooks Invoices, billing statements, checks, and other business mail. Your return and sender address will line up perfectly.Brand | Blue Summit Supplies #ad |
Manufacturer | Blue Summit Supplies #ad |
Height | 4.4 Inches |
Length | 11.9 Inches |
Weight | 6.25 Pounds |
Width | 10.1 Inches |
Part Number | BSS-92588-003 |
Model | 74689 |
More information #ad
10. ValBox
#ad
Business Statements and Legal Documents, ValBox 500 Count #10 Double Window Envelopes 4-1/8x9-1/2" Self Seal Security Envelopes for QuickBooks Invoices
#adValBox #ad - Premium quality: these #10 double window envelope features with durable 24lbs white wove paper, peel-off strip, stronger glue and security tint design. If there's anything make you unhappy or unsatisfied about the products, please do contact us without any hesitation. You don't need to stand licking envelopes and using glue or the water activators, which is time consuming and messy.Protect your invoice and statement privacy. Strong adhesive: with the strong adhesive flap, valbox #10 double window envelopes will be more evident if tampered. Security invoice envelopes: forget the thin, try our valbox #10 security envelopes, which fit QuickBooks invoices, torn easily and see-through envelopes you used in the past, multiple business billing statements and return envelopes perfectly!!! The contents are also easy to slip in.
More information #ad
The detail position for the double windows, eliminating the need for hand addressing or printing mailing labels, please refer the size chart on the second photos. No need to worry about opening them easily by others. Great self seal envelopes. Notice: this #10 double window envelope is not for QuickBooks Checks!!! Double windows design: the windows line up perfectly with return and sender address, ideal for legal and standard business mailings, return documents and more. The self-seal feature makes these envelopes with windows much more convenient than regular, moisten-and-seal ones.
Brand | ValBox #ad |
Manufacturer | ValBox #ad |
Part Number | VB052 |
Model | VB052 |
More information #ad