Office Impressions White Gummed Closure Commercial Flap Number 10 Trade Size Security Tint Envelope,4.13 X 9.5 Inch -- 500 Per Box

Perfect for businesses with a large volume of outbound mail. The flaps feature built in solid gum adhesive, which just needs to be moistened before sealing. Help the recipient get right to the point by revealing pertinent information through the single window slot covered by smooth, dense glassine material.