Quality Park Open-End Poly Expansion Mailers - Expansion - 11" Width x 13" Length - 2" Gusset - Self-sealing - Polyethylene - 100 / Carton - White

Open-end Poly Expansion Mailers are durable and moisture-resistant. Ideal for bulky mailings. High-density polyethylene construction is far stronger than paper and a convenient Redi-Strip closure. Simply peel strip off and fold flap closed. Pressure-sensitive gum forms permanent bond.