Top Pack Supply Expansion Poly Mailers 11 x 13 x 4 White Pack of 100

11 x 13 x 4" Expansion Poly Mailers. Strong polyethylene mailers protect products from moisture during shipping. Features a gusseted bottom to allow for thicker items such as binders, books and catalogs. Puncture, moisture, tamper and tear resistant. High strength seams will keep contents intact even if over packed. The outer surface of the mailer is white and the inner lining is silver. Labels, ink and stamps adhere well. Self-seal closure with a double perforation tear strip for easy opening.