Quality Park Redi Seal Security Tinted Window Envelope, 4 1 2" x 9 1 2", Woven White, 500 Box Safety Poly tubing in clear color Presentation Type:Standard Poly tubing in clear color with 6 mil thick is made from low density polyethylene that can be recycled The vinyl tab construction stands up to frequent handling The security tinting hides text from view Brand Name: Quality Park Color Family: White Envelope Closure: Self Seal Envelope Flap Style: Rectangular Envelope Material: Paper Envelope Pack Size: 500 Per Pack Envelope Paper Finish: Wove Envelope Size: 4 1 2" x 9 1 2" Envelope Type: Window Envelope Window Location: Single Right Height in Inches: 4