... with mirror surface finish and good corrosion resistance, best suitable for plastic moulding of PVC, PP, PE, PC, machine ... finishing. 718H High purity High quality mould inserts, best suitable for moulding of PS,PE,PP,ABS. 2316 High corrosion ... corrosion resistance moulds with good polishability P20 Good polishability Suitable for moulds require good surface polishing 2312 Excellent machinability Plastic ...