200 (100x2) 7"x10.5" Poly Mailers Self sealing Envelopes Shipping Bags-ENVELOPES POLYBAG (7.5x10.5) Poly Mailer is designed to provide maximum protection and has excellent puncture resistance. Color: White-conceals packages from visibility. Made from premium polyethylene-which enables easy label, stamp and ink application. Plain exterior-ideal for logo/brand printing and marketing.