... 4.Inspected by CMM 5. Ra1.0, Polish Ra0.4 Piston casting used for industrial clutch and brakes.1. Material: ASTM ... fittings, Template parts, Railway fittings, ring flange , electromagnetic steel cover, piston, pressure plate, center plate, wear plate, cylinder, impeller, disc etc ... 20 customers all over the world;2.Exporting to U.S.A, U.K., Germany, Italy, Japan, Swiss, Australia, and South-east ...