Columbian #9 Double-Window Security Envelopes, SimplySafe Tamper Evident, Pull Strip, Peel and Seal, for Invoices and Statements, 3-7/8 x 8-7/8 Inches, 500 per Box (COLO166), White

Columbian #9 Double-Window Security Envelopes, SimplySafe Tamper Evident, Pull Strip, Peel and Seal, for Invoices and Statements, 3-7/8 x 8-7/8 Inches, 500 per Box (COLO166), White

• Box of 500 Columbian white double window #9 envelopes (3-7/8" x 8-7/8") with a SimplySafe tamper-evident seal and peel off Release & Seal closure; top window: 7/8" x 3 1/2"; bottom window: 1" x 4"
• Columbian #9 double window envelopes have a patented SimplySafe seal that will show signs of tampering, safeguarding against unauthorized opening
• Protect critical documents or your customers' sensitive data; these tinted envelopes have a reflex blue pattern that obscures the details of what's inside
• Each #9 envelope is easy to open and close; simply remove the Release & Seal strip and press the flap closed for a clean, sanitary seal; use the pull strip to open without difficulty
• Stock up on boxes of 500 window envelopes and save; great for bulk mailings, these number 9 envelopes show sender and receiver addresses and can be run through a postage machine