... material:steel 2.Surface treatment Carburizing, hardening and tempering, nitriding, heavy duty truck synchronizer hub Detailed Product Description ISO/TS 16949:2009 ... 2, Customized packingSmall orders accepted. Larger order quantity makes lower unit price!Our main products: gearbox ZF 5S-150GP, 5S- ... , Yaxing, Ankai(AK), JAC, Zonda, Daewoo, Neoplan, Kaisiboaer, etc. heavy duty truck synchronizer hub