Two pieces roller shell rim. Heat treated shells for body strength and longer wear life. 1 x Bottom Roller （ As Shown ）. Heat treated for a deep uniform hardened depth that provides wear life equal to link wear life....
1x Bottom Roller. Bolt, grade 12.9, HRC45-52. Surface Hardness: HRC52-58, Deepth:5mm-8mm. So we could help you solve the problem well. Material: 50 MnB Steel. Many of our products have overseas warehouses....
Two pieces roller shell rim. Heat treated shells for body strength and longer wear life. 1 x Bottom Roller （ As Shown ）. Heat treated for a deep uniform hardened depth that provides wear life equal to link wear life....