... co-extrusion plastic mail bag Made of PE,multilayer co-extrusion Self-adhesive Customized design custom multilayer co-extrusion plastic mail bag Made of PE,multilayer co ... closureColours - Grey White and so on MaterialLDPE or HDPE co-extrusion material, outside-white and inside-grey color, 0. ... kinds of raw materials: PO, PE, OPP, PP, PVC, CPE, PO/PE and composite material,eco-friendly materials. can ...