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1. Amazon Basics

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Security Tinted, 500-Pack, Double Window, Amazon Basics #9 Envelopes with Peel & Seal

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Amazon Basics #ad - Double window allows sender and recipient addresses to show through. 500-count pack of #9 security envelopes with Peel & Seal closure—no moisture needed. Measures 3-7/8 by 8-7/8 inches each. Interior security tint keeps content private; securely send checks, invoices, or other confidential documents. 24-pound white wove paper for quality and strength; ideal for home or office.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Height8.8 Inches
Length1 Inches
Weight5.96 Pounds
Width3.88 Inches
Part Numberamz43
ModelAMZ43

2. Aimoh

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500 Count 30139, Statements & Documents, 500#9 Double Window SELF Seal Security Envelopes, Size 3-7/8 x 8-7/8-24 LB, for Invoices, Security Tinted

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Aimoh #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. 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.

Double windows; professional, easily read double front windows suitable for standard business and legal mailings, advertising campaigns and many more, eliminating constantly printing and hand writing addresses, 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.

9 double window quick seal security envelopes; tired of cheap thin, extra large, with premium security tint, easily torn envelopes? Aimoh's#9 Security Envelopes are the perfect solution, 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.
BrandAimoh #ad
ManufacturerAimoh #ad
Height4.1 Inches
Length11.5 Inches
Weight0.01 Pounds
Width9.2 Inches
Part NumberFBA_30139
Model30139

3. Blue Summit Supplies

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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, 500 No. 9 Flip and Seal Double Window Security Envelopes

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Blue Summit Supplies #ad - Provides complete business mail security: your invoices and statements will be completely hidden with our dark security tint design. Maintains professional look and feel throughout transit with our durable 24 LB white wove envelope paper.

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. 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.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Weight5.27 Pounds
Part NumberBSS-92588-007

4. GSM Brands

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Box of 500, for Quickbooks Business Invoices 3 7/8" x 8 7/8", Self Seal Double Window Security Envelopes #9

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GSM Brands #ad - Box of 500 drives value - our #9 envelopes come in a box of 500, and are perfect for bulk mailings or general office supply. Save money, time, and energy by stocking up with the 500 count box. Security pattern protects your information - the woven blue security pattern prevents the contents from being seen through the 26 lb white paper envelope.

Money back guarantee - we are confident that you will have a great experience with these self seal double window envelopes. The double widows are built to display the sender and receiver addresses of standard invoice configurations. This will give you peace of mind to know that your invoices are only viewed by the intended recipient. Simply insert the invoice, peal away the protective strip, and press the envelope flap down firmly for a strong adhesive hold.

Easy adhesive self seal - our peel and seal envelopes do not require moisture to activate the adhesive. If these envelopes fail to live up to your expectations, simply return them for a full refund. Designed for quickbooks printed business invoices - Save time and energy with our self seal double window envelopes specifically designed for use with most printed Quickbooks business invoice layouts.
BrandGSM Brands #ad
ManufacturerGSM Brands #ad
Part Number#9 Envelope

5. Blue Summit Supplies

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Number 10 Size 4 1/8 Inch X 9 ½ Inch, 500 No. 10 Self Seal Double Window Security Envelopes, and Return Envelopes, Perfect Size for Multiple Business Statements, Quickbooks Invoices

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Blue Summit Supplies #ad - Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope 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.

Our security envelopes will quickly and easily create a strong seal for completely secure business mail. Perfect for mailing invoices, checks, billing statements, QuickBooks Invoices, and other business mail. Provides complete business mail security: your business mail will be completely hidden with our dark security tint design. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker. Just peel and seal for a strong lasting seal. Your return and sender address will line up perfectly.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Height4.4 Inches
Length11.9 Inches
Width10.1 Inches
Part NumberBSS-92588-003
Model74689

6. Quality Park

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3-7/8 x 8-7/8. 500 per Box 67529, Quality Park #9 Double Window Security Tinted Invoice and Statement Envelope with Reveal-N-Seal Self Seal Closure, 24 lb White Wove

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Quality Park #ad - The reflex blue pattern lining the envelope's interior makes it impossible to see the details of the contents, even when held up to the light. 500 envelopes in each box: ideal for both everyday office use and bulk mailings, each box of Quality Park #9 Double Window Security Tinted Invoice and Statement Envelopes provides a long lasting supply! Positioned to fit most invoice address layouts, this double window envelope not only saves time but also makes sure the document is delivered straight into the customer's hands! The 1-3/16" x 3-1/2" top window is positioned 3/8" from the left and 2" from the bottom.

Enhanced privacy features: protect sensitive client information with these security tinted envelopes. Reveal-n-seal self seal closure: the best overall self-sealing envelope in the industry! It's patented seal design allows for an aggressive quick seal.

A built-in security feature along the top of the flap shows indications of tampering. The 1" x 4" bottom window is positioned 3/8" from the left and 1/2" from the bottom. Simply pull the bottom flap up, fold the top flap down and press to seal. Convenient double window: display the sender and receiver addresses through the double window openings. Mail invoices, statements and other important documents with confidence.
BrandQuality Park #ad
ManufacturerQuality Park #ad
Height9 Inches
Length12 Inches
Weight5.8 Pounds
Width3.88 Inches
Part Number67529
Model67529

7. Quality Park

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Quality Park #9 Security Envelopes, Invoices/QuickBooks Statements, 3-7/8 x 8-7/8 Inches, 24 lb White, Double Window, Self Seal, 500/Box QUA24529

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Quality Park #ad - 9 mailing envelopes measure 3 7/8 in height x 8 7/8 in width and are made of 24 lb white wove paper with professional side seams; #9 envelopes fit into #10 envelopes.

These boxes of 500 white #9 double window security envelopes 3 7/8 in x 8 7/8 in protect your customers' sensitive data; a reflex blue pattern obscures the details of what's inside. Stock up on boxes of 500 machinable #9 envelopes for bulk mailings. Double window envelopes show sender and receiver addresses; top window is 1 3/16" x 3 1/2"; 3/8" from the left; 2" from the bottom; bottom window is 1" x 4"; 3/8" from the left; 1/2" from the bottom. Redi-seal self seal mailing envelopes require no moisture; the unique double flap design allows you to simply raise the lower flap and press to seal.
BrandQuality Park #ad
ManufacturerQuality Park #ad
Height3.63 Inches
Length13.13 Inches
Weight0.01 Pounds
Width9.13 Inches
Part NumberQUA24529
ModelQUA24529

8. Office Deed

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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''

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Office Deed #ad - The liner keeps the gum dust-free before use. Simply press flaps together for a secure, strong seal.  . Privacy: protect confidential client information with our security tinted envelopes. Our products will the perfect fit for all official purpose with high standard quality.

They come in boxes of 500, so you can stock up for long-term use.  . Wove finish adds a professional touch. 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. Quality: our security self seal envelopes made of 24-lb white wove.

Double window: #9 double window envelopes ideal for Quickbooks Invoices, Business Statement, Documents Secure Mailing. Peel & seal closure: with the peel & seal closure, envelopes do not require licking to seal. 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.
BrandOffice Deed #ad
ManufacturerOffice Deed #ad
Weight4.43 Pounds
Part NumberSSEDW9
ModelSSEDW9

9. Blue Summit Supplies

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500 No. 9 Double Window Security Envelopes, Designed for Quickbooks Invoices and Business Statements with Self Seal Peel and Seal Flap, Number 9 Size 3 7/8 Inch X 8 7/8 Inch

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Blue Summit Supplies #ad - 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.

Provides complete business mail security: your invoices and statements will be completely hidden with our dark security tint design. Quickly and easily stuff our wide envelopes with several invoices or business statements. Just peel and seal to create a strong lasting seal without licking or moistening. Maintains professional look and feel throughout transit with our durable 24 LB white wove envelope paper. Our self seal design is quick and easy and is guaranteed to stay sealed with no need for tape or glue sticks.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Height4.5 Inches
Length8.5 Inches
Width12 Inches
Part NumberBSS-92588-002

10. Next Day Labels

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#9 Ready-Seal Double Window Security Tinted Check Envelopes, Blackbaud Software ETC, Compatible for QuickBooks Checks, Sage 100 program, Box of 500

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Next Day Labels #ad - Stop licking envelopes" Just fold the flap, get a quick, secure seal. Guaranteed to fit all your computer business checks. Made in the usa by Next Day Labels TM. Fold and seal - Security Tint Inside. Box of 500 #9 double window check Envelope, 3-7/8 X 8-7/8.
BrandNext Day Labels #ad
ManufacturerNext Day Labels #ad
Weight0.01 Pounds
Part Number6587