1.Cast aluminum Piston ASTM356-T6 2.ASTM 356-T6 Aluminum 3.Low pressure casting 4.17kg/cm2 leak test 5.Inspected by CMM The cast aluminum piston used for Industrial Clutches & Brakes, The Industrial Clutches & Brakes were used to many areas of industry, covered Metalforming, Mining, Material handling, Oilfields and the Marine maketplace etc. Include Hydraulic, Air clutch & brake ,Water cooled. ...