Columbian #9 Security Envelopes, 500/Box, Double Window, 3-7/8″ x 8-7/8″, Redi-Seal Self Seal, For Invoices & QuickBooks Statements, White (COLO181) ✓ Free 60 Day Returns ✓ Free Express Shipping Description: Columbian 9 Security Envelopes are ideal for mailing important documents or sending sensitive client information and are often used as reply or return envelopes for invoices and business mailings. Each security tinted envelope has a scrambled blue pattern printed on the interior that conceals the contents. These self seal envelopes have a special Redi-Seal closure that doesn’t require any moisture to seal. Simply press the bottom flap to the top flap and close. Double window envelopes show sender and receiver addresses; the top window dimensions are 1-3/16 x 3-1/2 inches, 3/8 inches from the left and 2 inches from the bottom; the bottom window dimensions are 1 x 4 inches, 3/8 inch from the left and a 1/2 inch from the bottom. 24 lb White wove paper with side seams give these business envelopes a professional appearance. Stock up on number 9 mailing envelopes with security tint for billing paperwork, tax documents, accounting records and more. Overall envelope dimensions are 3-7/8 x 8-7/8 inches. White. Box of 500. Features: Get a jumbo box of 500 Columbian double window #9 envelopes (3-7/8″ x 8-7/8″) each with a security tinted interior and quick press-to-seal Redi-Seal closureEach white envelope is made from 24 lb white wove paper with an interior security tint pattern so you can't see what's inside; ideal for obscuring sensitive information & protecting critical documents#9 Envelopes fit inside #10 envelopes; side seam envelopes allow for a smooth, fold-free back panel for printing graphics, logos, and moreRedi-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 closedDouble window envelopes display just the sender & receiver addresses and keep sensitive information out of view; top window: 1-13/16″ x 3-1/2″; bottom window: 1″ x 4″; envelope: 3-7/8″ x 8-7/8″ Product Details: Brand: ColumbianColor: WhiteClosure Type: Self-SealMaterial: PaperNumber of Items: 500Product Dimensions ‏ : ‎ 7 x 3 x 0.1 inches; 5.35 PoundsItem model number ‏ : ‎ COLO181Date First Available ‏ : ‎ April 5, 2022Manufacturer ‏ : ‎ TOPS ProductsCountry of Origin ‏ : ‎ MexicoBest Sellers Rank: #35,456 in Office Products (See Top 100 in Office Products) #145 in Business Mailing Envelopes#145 in Business Mailing EnvelopesCustomer Reviews: 4.2 4.2 out of 5 stars 64 ratings