... HRC56-58,depth:6-8mm Warranty: one year YENISAY track chain ISO:9001, Good wear resisitant Material:40Mn2 HRC56-58, ... Manufacture of Xingtai Tianhong Magneto Factory is here, exporting track link assembly, track rollers etc, with good quality and competitive ... etc. We can also offer OEM service.Advantage: Our track link assembly (track chains) are specifically designed, engineered and manufactured, ...