... ba Poly courier bag, express bag, and mailing bag, express delivery bag, mailer bag, post envelope: materialLDP and HDPE coextrusion ... , shockproof, can be recycled.4) Usage: for post, delivery packing, express delivery, courier mailing and deposit packing.5) Style: with permanent ... are the international top brand processor,such as for DHL, FedEX, YISHION.etc7)supply ability: all product at least 8, ...