40Mn2 Sumitomo Crawler Crane SC550-2 Track Roller

We are offering crawler crane sc550-2 track roller.
1).warranty: one year
2). Accept : oem or drawing
3).certificate:iso9001:2008 ;iso1004:2004
4) material: 40mn2
5) technique: forging
6)crawler crane undercarriage parts includes:
track shoe, track roller, top roller, sprocket, idler,pin, track chain.
7)for machinery:
bottom roller for crawler crane hitachi,sumitomo,ihi,kobelco,sany,xcmg,fuwa, nippon sharyo , manitowoc , ruston-bucyrus , terex demag ,link-belt, american , liebherr ,lima, kinki ishiko ,etc.