die casting parts ending cover and piston made by aluminium-alloy for pneumatic cylinder ,ISO ... SU,TN,STM,CK die casting partsending cover and piston made by aluminium-alloy for pneumatic cylinder ,ISO ... the different kind aluminium .zinc ,plastic ,die casting parts and make different kind mold according to our customer ... kind mold according to customers request!!! ISO 6431 piston(die casting parts)