Material: cast steel, forging, of C45, 40Cr, ... Hardness: HRC :42-45 ...... Surface hardening, surface hair blue, surface pai Material: Cast steel, Forging ,C45, 40Cr…Hardness : HRC 42-45…Surface hardening ,Surface hair blue, Surface paint, bright paintmatt paint ,baked plastic…carton packaging, wooden packaging, Tito packaging … pto shaft