1.piercing punch,for air conditioner die 2.die components 3.process ... Machinery Co.,Ltd Products precision mould parts, standard and customized punches, guide pins, guide bushings, ejector ... sleeves, die inserts,carbide pins,die casting part and components,locking blocks Applied in automobile die, ... Plus or Minus tolerances.2. Type of material and hardness needed.3. Part application.4. Target price ...