The hardness of the surface, accurate machining, wear resistance are the most important factors for efficient Idler. we use the good quality assured materials and ma ke the undercarriage parts to maximum the durability. Bulldozer Series1.Carrier roller,track roller,idler,cutting edge,end bits and buckets,covers, final driver parts, ripper parts, push rods, and blades of Shantui bulldozers: TY320, TY220, TY160, and TY130.2. Huanghe, Pengpu, Yishan, Xuanhua bulldozer parts.Excavator Series1.Various parts, such as pins, bushings, cylinder piston rods,carrier roller,idler,sprockets , recoil spring,buckets and accessoriers, hoses and tubes for Komatsu series of excavator: PC60, PC130, PC200/220, OC300, PC360, PC4002. Hitachi, Cat, Doosan, Hyundai, Volvo, Sumitomo, Kato, and other series of excavator parts.Engine Cummins engine,Our company represents Shantui track with reasonable prices and quality guarantee.We also provide small, medium, and big repair for bulldozers and technical consultation.