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Main image of #9 Security Envelopes, Double Window, Self Seal, Invoices/QuickBooks Statements, 3-7/8 x 8-7/8 Inches, 24 lb White, 500/Box (QUA24529)

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

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Our large box of 500 #9 double-window envelopes (3-7/8 in x 8-7/8 in) accommodate QuickBooks invoices & statements, not checks!; our self-seal envelopes feature Redi-Seal press-to-seal closures & security tints Redi-Seal mailing envelopes boast a distinctive double-flap design that needs no moisture; simply lift the lower flap and press for an effortless self-seal envelope Double-window envelopes reveal only the sender and receiver addresses; our business envelopes keep private details out of sight; top window: 1-3/16" x 3-1/2"; bottom: 1" x 4"; envelope: 3-7/8" x 8-7/8" Security envelopes protect identification numbers & private data with a unique security pattern to obscure the look of text; safeguards envelope contents from curious eyes, even when held up to light #9 Mailing envelopes measure 3-7/8" x 8-7/8" and fit neatly inside #10 envelopes as reply envelopes; crafted from 24 lb white wove paper with clean side seams; stock up with boxes of 500

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Our large box of 500 #9 double-window envelopes (3-7/8 in x 8-7/8 in) accommodate QuickBooks invoices & statements, not checks!; our self-seal envelopes feature Redi-Seal press-to-seal closures & security tints Redi-Seal mailing envelopes boast a distinctive double-flap design that needs no moisture; simply lift the lower flap and press for an effortless self-seal envelope Double-window envelopes reveal only the sender and receiver addresses; our business envelopes keep private details out of sight; top window: 1-3/16"
x 3-1/2"; bottom: 1"
x 4"; envelope: 3-7/8" x 8-7/8" Security envelopes protect identification numbers & private data with a unique security pattern to obscure the look of text; safeguards envelope contents from curious eyes, even when held up to light #9 Mailing envelopes measure 3-7/8" x 8-7/8" and fit neatly inside #10 envelopes as reply envelopes; crafted from 24 lb white wove paper with clean side seams; stock up with boxes of 500

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First Listed on Newegg	August 19, 2026

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Return for refund within: 30 days
Return for replacement within: 30 days
This item is covered by Yara Official Flagship Return Policy

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Item#: 9SIC7NTM4Y1575