... good performance of high mirror polish,anti-acid, anti-rust after heat treatment3 good corrosion resistance4 resistance for erosive ... , good performance of high mirror polishing, anti-acid, anti-rust after heat- treatment3. Good corrosion resistance4. Resistance for erosive ... , good interchangeabilityNote tips:1. when you stop producing or remove the mould, please paint antirust paint on cavity, thread ...