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9 double window quick seal security envelopes; tired of cheap thin, easily torn envelopes? Aimoh's#9 Security Envelopes are the perfect solution, with premium security tint, extra large, easily read dual front windows and super secure quick seal adhesive.
Security tint; forget thin, easily read envelopes these premium #9 Security Envelopes are designed with security tinted wave patterns which easily obscure details, numbers and other data within, perfect for mailing business statements and invoices while protecting sensitive information. Long lasting supply; ideal for everyday business use and professional mass mailings, each box of these premium #9 Security Envelopes provide a super long lasting 500 envelope supply, for the best value on the market! Click the Orange Button to order now.

Provides complete business mail security: your invoices and statements will be completely hidden with our dark security tint design.



Tinted security wave pattern; perfect for mailing invoices, legal documents and sensitive correspondence, statements, standard business, our #9 Envelopes are printed with a secure tinted wave pattern, easily obscuring numbers and data for premium, 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 and legal documents, with secure moisture activated gummed seal and tinted security wave patterns. Dual window design; easily read dual windows for everyday business mailings to easily display postal addresses.


The detail position for the double windows, eliminating the need for hand addressing or printing mailing labels, ideal for legal and standard business mailings, please refer the size chart on the second photos.
If there's anything make you unhappy or unsatisfied about the products, please do contact us without any hesitation. Strong adhesive: with the strong adhesive flap, valbox #9 double window envelopes will be more evident if tampered. Premium quality: these #9 double window envelopes feature with durable 24lbs white wove paper, peel-off strip, stronger glue and security tint design. No need to worry about opening them easily by others.

They come in boxes of 500, so you can stock up for long-term use. . Mail invoices, statements and other important documents with confidence.
The blue tint pattern makes impossible to see the details of the contents, even when held up to the light. The liner keeps the gum dust-free before use. Simply press flaps together for a secure, strong seal. . Peel & seal closure: with the peel & seal closure, double window envelopes do not require licking to seal.

Quickly and easily stuff our wide envelopes with several invoices or business statements.
1. Aimoh
#ad
500 Count 30139, Size 3-7/8 x 8-7/8-24 LB, Statements & Documents, 500#9 Double Window SELF Seal Security Envelopes, for Invoices, Security Tinted
#adAimoh #ad - Double windows; professional, easily read double front windows suitable for standard business and legal mailings, eliminating constantly printing and hand writing addresses, Each envelope contains two front windows, advertising campaigns and many more, a 1-3/16" X 3-1/2" top window positioned 3/8" from the left and 2" from the bottom and the bottom 1" X 4" window is 3/8" from the left and 1/2" from the bottom.9 double window quick seal security envelopes; tired of cheap thin, easily torn envelopes? Aimoh's#9 Security Envelopes are the perfect solution, with premium security tint, extra large, easily read dual front windows and super secure quick seal adhesive.
More information #ad
Quick seal adhesive; aimoh's #9 envelopes use ultra secure, super secure seal across each envelope’s width that won’t easily open or tear as with cheaper gummed seals, quick seal adhesive to create a full, perfect for larger and thicker documents. Security tint; forget thin, easily read envelopes these premium #9 Security Envelopes are designed with security tinted wave patterns which easily obscure details, numbers and other data within, perfect for mailing business statements and invoices while protecting sensitive information. Long lasting supply; ideal for everyday business use and professional mass mailings, each box of these premium #9 Security Envelopes provide a super long lasting 500 envelope supply, for the best value on the market! Click the Orange Button to order now.
Brand | Aimoh #ad |
Manufacturer | Aimoh #ad |
Height | 4.1 Inches |
Length | 11.5 Inches |
Weight | 0.01 Pounds |
Width | 9.2 Inches |
Part Number | FBA_30139 |
Model | 30139 |
More information #ad
2. Blue Summit Supplies
#ad
500 No. 9 Flip and Seal Double Window Security Envelopes, Designed for Quickbooks Invoices and Business Statements with Self Seal Flip Press and Seal Flap -Number 9 Size 3 7/8 Inch X 8 7/8 Inch
#adBlue Summit Supplies #ad - Quickly and easily stuff our wide envelopes with several invoices or business statements. Perfectly fits quickbooks invoices and business statements: sender and return address will be visible on your QuickBooks invoices and monthly bills through our unique double window design.Provides complete business mail security: your invoices and statements will be completely hidden with our dark security tint design.
More information #ad
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. Maintains professional look and feel throughout transit with our durable 24 LB white wove envelope paper.Brand | Blue Summit Supplies #ad |
Manufacturer | Blue Summit Supplies #ad |
Weight | 5.27 Pounds |
Part Number | BSS-92588-007 |
Model | BSS-92588-007 |
More information #ad
3. Amazon Basics
#ad
White, 500 ct, Amazon Basics #9 Double Window Security Tinted Envelopes
#adAmazon Basics #ad - Ideal for 8. 5-by-11-inch computer-generated invoices and statements. 9 envelopes measures 3-7/8 by 8-7/8 inches each. Double windows 3/8-inch from the left to show sender info 2 inches from bottom and recipient info 1/2 inch from bottom.More information #ad
500 standard-size security-tinted #9 double window envelopes.Brand | Amazon Basics #ad |
Manufacturer | Amazon Basics #ad |
Height | 0.01 Inches |
Length | 8.88 Inches |
Weight | 0.1 Pounds |
Width | 9.25 Inches |
Part Number | AMZ92W |
Model | AMZ92W |
More information #ad
4. Next Day Labels
#ad
Blackbaud Software ETC, Box of 500, #9 Ready-Seal Double Window Security Tinted Check Envelopes, Sage 100 program, Compatible for QuickBooks Checks
#adNext Day Labels #ad - Guaranteed to fit all your computer business checks. Box of 500 #9 double window check Envelope, 3-7/8 X 8-7/8. Made in the usa by Next Day Labels TM. Stop licking envelopes" Just fold the flap, get a quick, secure seal. Fold and seal - Security Tint Inside.More information #ad
Brand | Next Day Labels #ad |
Manufacturer | Next Day Labels #ad |
Weight | 0.01 Pounds |
Part Number | NDL Check Envelopes |
Model | 92664 |
More information #ad
5. Aimoh
#ad
#9 Double Window Security Business Mailing Envelopes for Invoices, Security Tinted, Size 3-7/8 x 8-7/8, 24 LB, White, GUMMED Closure, 500 Count 30129, Statements and Legal Documents
#adAimoh #ad - Long lasting supply; perfect for everyday business use, 500 envelope supply measuring 3-7/8 x 8-7/8, our envelopes are provided as an ultra-long lasting, ideal for mass mailing of business documents! Click the Orange Button to order now.Tinted security wave pattern; perfect for mailing invoices, legal documents and sensitive correspondence, statements, standard business, our #9 Envelopes are printed with a secure tinted wave pattern, easily obscuring numbers and data for premium, added security compared to other cheap envelopes.
More information #ad
Each envelope contains two front windows, a 1-3/16" x 3-1/2" top window positioned 3/8" from the left and 2" from the bottom and the bottom 1 X 4" window is 3/8" from the left and 1/2" from the bottom. 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 and legal documents, with secure moisture activated gummed seal and tinted security wave patterns. Dual window design; easily read dual windows for everyday business mailings to easily display postal addresses.
Brand | Aimoh #ad |
Manufacturer | Aimoh #ad |
Height | 4 Inches |
Length | 11.3 Inches |
Weight | 5.5 Pounds |
Width | 9.1 Inches |
Part Number | 30129 |
Model | 30129 |
More information #ad
6. Office Depot
#ad
77166, Office Depot Double-Window Envelopes, 9 3 7/8in. x 8 7/8in., White, Clean SealTM, Box of 250
#adOffice Depot #ad - Self-adhesive closure keeps the contents safely inside. Security tint inside provides confidentiality. Includes an office depot clean seal double-window envelopes #9 box of 250 Windows clearly display return and mailing address.More information #ad
White double-window envelopes measure 3-7/8" x 8-7/8". Great for businesses that use check-writing software and computer-generated forms, double-window envelopes clearly display addresses from the inside. Make mailing labels a thing of the past in your office with these Office Depot envelopes.Brand | Office Depot #ad |
Manufacturer | Office Depot #ad |
Length | 8.88 Inches |
Part Number | MPA/OD/156 |
More information #ad
7. ValBox
#ad
Business Statements and Legal Documents, ValBox 500 Count #9 Self Seal Security Envelopes 3-7/8x8-7/8" Double Window Envelopes for QuickBooks Invoices
#adValBox #ad - The self-seal feature makes these envelopes with windows much more convenient than regular, moisten-and-seal ones. Protect your invoice and statement privacy. Security invoice envelopes: forget the thin, try our valbox #9 double window security envelopes, torn easily and see-through envelopes you used in the past, which fit QuickBooks invoices and business billing statements perfectly!!! The contents are also easy to slip in.The detail position for the double windows, eliminating the need for hand addressing or printing mailing labels, ideal for legal and standard business mailings, please refer the size chart on the second photos.
More information #ad
Double windows design: the windows line up perfectly with return and sender address, advertising campaigns and more. Great self seal envelopes. You don't need to stand licking envelopes and using glue or the water activators, which is time consuming and messy. If there's anything make you unhappy or unsatisfied about the products, please do contact us without any hesitation. Strong adhesive: with the strong adhesive flap, valbox #9 double window envelopes will be more evident if tampered. Premium quality: these #9 double window envelopes feature with durable 24lbs white wove paper, peel-off strip, stronger glue and security tint design. No need to worry about opening them easily by others.
Brand | ValBox #ad |
Manufacturer | ValBox #ad |
Part Number | VB051 |
More information #ad
8. Office Deed
#ad
Office Deed 500 #9 Double Window SELF SEAL Security Envelopes-Designed for Quickbooks Invoices and Business Statements with peel and seal flap -3 7/8'' X 8 7/8''
#adOffice Deed #ad - Our products will the perfect fit for all official purpose with high standard quality. Quality: our no 9 security self seal envelopes made of 24-lb white wove. 500 envelopes in each box: our #9 3 7/8'' x 8 7/8'' envelopes ideal for any document from official business letters to business statement.They come in boxes of 500, so you can stock up for long-term use. . Mail invoices, statements and other important documents with confidence.
More information #ad
Wove finish adds a professional touch. Privacy: protect confidential client information with our security tinted envelopes. Double window: #9 double window envelopes ideal for Quickbooks Invoices, Business Statement, Documents Secure Mailing. The blue tint pattern makes impossible to see the details of the contents, even when held up to the light. The liner keeps the gum dust-free before use. Simply press flaps together for a secure, strong seal. . Peel & seal closure: with the peel & seal closure, double window envelopes do not require licking to seal.
Brand | Office Deed #ad |
Manufacturer | Office Deed #ad |
Weight | 4.43 Pounds |
Part Number | SSEDW9 |
Model | SSEDW9 |
More information #ad
9. Blue Summit Supplies
#ad
500 No. 9 Double Window Security Envelopes, Number 9 Size 3 7/8 Inch X 8 7/8 Inch, Designed for Quickbooks Invoices and Business Statements with Self Seal Peel and Seal Flap
#adBlue Summit Supplies #ad - Just peel and seal to create a strong lasting seal without licking or moistening. Perfectly fits quickbooks invoices and business billing statements: sender and return address will be visible on your QuickBooks invoices and monthly bills through our unique two window design.Quickly and easily stuff our wide envelopes with several invoices or business statements.
More information #ad
Maintains professional look and feel throughout transit with our durable 24 LB white wove envelope paper. Provides complete business mail security: your invoices and statements will be completely hidden with our dark security tint design. Our self seal design is quick and easy and is guaranteed to stay sealed with no need for tape or glue sticks.Brand | Blue Summit Supplies #ad |
Manufacturer | Blue Summit Supplies #ad |
Height | 4.5 Inches |
Length | 8.5 Inches |
Width | 12 Inches |
Part Number | BSS-92588-002 |
Model | BSS-92588-002 |
More information #ad