... .Inspected by CMM 5. Ra1.0, Polish Ra0.4 Piston casting used for industrial clutch and brakes.1. Material: ... , Template parts, Railway fittings, ring flange , electromagnetic steel cover, piston, pressure plate, center plate, wear plate, cylinder, impeller, disc ... and operation;3. The best product features;4. Product performance;5. Advanced machining and inspecting equipment;6. Prompt Delivery; ...