... Plastic Injection Mold. 2)We can produce all kinds of mobile phone shells following the customer. Specification: 1. core material: HH,Skd61, ... ,718,8407,S136,NAK80,P20,KD-61,NIMAX ect;3Hardness of the steel :20-60HRC ;4Cavity Qty :Single-cavity / Multi ... Years Professional Manufacture Experience, Specialize in design and the manufacture of Plastic Injection Mould and tooling for Automotive, Electronic ...