... 3.On-time delivery 4. excellent after-sales service car bumper mould Injection mould: household appliance mould, commodity mould, car ... product design, mould design, mould manufacture, injection/moulding Mould steel: P20,718,718H,2738,2316,S136(option) Cooling system;the ... hardness treatment:tempering the material in order to harden the steel;nitrided Final finish: chrome paiting (option); All tools ...