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