... 6431,DNC,MB,DNG,SC,,SU,TN,STM,CK diameter form 32mm~320mm2:Surface treatment:polishing ,nickel ... CNC machine,EDM spark machines,Drill machine ,die casting machine from 160T~800T also available!8:We ... the different kind aluminium .zinc ,plastic ,die casting parts and make different kind mold according to ... according to customers request!! die casting parts SC piston for air cylinder(air cylinder piston)