High goods quality Suitable for all kinds of kinds of medium or luxury bus or heavy truck like Howo, Benz, Volvo, Golden Dragon Item No: 1272304076 Synchro ringA: Features1) Material: Steel(20CrMo, 20CrMoTi, 42#,45#,ZF7B)2) Processing: Forging, Maching(Shapping, Hobbing), Heat Treatment, Annealing, Quenching...B: Packing1) Inner packing: Waterproof kraft paper packing2) Outer packing: Export ...