Staples #9 Gummed White Double Window Security Envelopes, 3-7/8" x 8-7/8", 500 Pack    

Staples #9 Double window envelope standard invoice measures 3-7/8" x 8-7/8" and is used for privacy/confidentiality. Envelope is protected throughout transport and it contains forms produced by most software mail systems, sold as 500 per box.

• #9, 3-7/8" x 8-7/8"
• Heavily gummed flap for secure sealing
• Overlapping centre and bottom seams resist bursting
• 24 lb. white wove
• Security tint