... of excavator and bulldozer undercarriage parts,such as Track Roller, Carrier Roller, Sprocket ,Segmnet, Front Idler, Track Link assembly,Track Shoes,Track Bolt and ... : Forging7.Hardness: HRC50-56\deepth:4mm-18mm8.Min. order: 2PCS9.Unit price: $54.51-56.2310.Payment: T\T, L\C11 ...