1, Plastic Welding Rod 2, Acid, alkali, salt, corrosion resistance, non-toxic Plastic Extrusion Wwelding Rod/Plastic Welding RodIntroduction:1), The product is PE resin ... : acid, alkali, salt, corrosion resistance, non-toxic. 3), Product use: for plastics extrusion welder welding plastic board, in the production, pipe fittings manufacture ...