ASI Track Bottom Roller fits Caterpillar Cat 302.5 303 303.5 e303 #185-7280
Surface Hardness: HRC52-60, Deepth:5mm-10mm. 1 Year warranty against manufacture defect. Anyway ,by nice communications ,we can find a way to make you satisfied. Material: 50 MnB Steel. We will do our best to solve your problem as soon as possible.