... :P20, 45#, 378, S136, 718, NAK80, etc. Plastic mold Detail information the mould1. plastic mold materialP20, 45#, 378, S136, 718, NAK80, 738 ... assures uniform heating and greatly improves the quality of the plastic products.4. Lip cavity is made of imported nitrated steel ... .Welcome to visit our factory and welcome OEM The most durable plastic mold