#10 Trade Size Security Tint Envelope, Commercial Flap, Gummed Closure, 4.13 x 9.5, White, 500/BoxWove finish adds a professional touch. Security tint for privacy. Gummed flap provides a secure seal. Windows provide faster addressing. 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.