Material:cast iron,Hardeness:48-53HRC High quality gear and bearing Noiseless,stable performance,adurable Chrome surface 1.This product is made of cast iron and harden to 48-53HRC.2.Chose high quality gear and bearing.3.Noiseless,stable performance and adurable.4.Surface is chrome and has less friction and hard to wear out. Motorcycle Camshaft(W-039)