Our sprockets are made by high quality of cast materials, optimum heat treatment, and accurate precision machining. Back-up data controlling defect rate and Vertical NC ensure and make them as good quality products. 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.