... material:steel 2.Surface treatment Carburizing, hardening and tempering, nitriding, heavy duty truck gearbox main shaft Detailed Product Description ISO/TS 16949 ... :2009 ZF Technology Match type:ZF gearbox 5S-111GP for Howo,North Benz,Steyr,Mercedes Benz,etc OEM parts ... all of their spare parts.We supply transmission gearbox parts for Howo, Steyr King, Steyr, Mercedes Benz, North Benz(Beiben ...