With precision engineered components, careful heat-treatment and lifetime sealing system, the carrier rollers are assured of long life. The roller shells are forged from deep hardening steel and are designed to resist bell mouthing. All rollers carry manufacturers warranty. We product good quality Carrier Roller for Excavator and Bulldozer, also stock some spare parts such as Komatsu, Caterpillar, Kobelco, Hitachi, Kato etc.