... wear resistance 3.Good quality sprocket 4.Reasonable price 5.Sprocket manufacturer direct sale Komatsu sprocket rim1.High precision ... 2,EX270-1,EX300-1/2/3/5,EX400-1,EX450-5,UH063,UH07-5/7,UH083KA TOHD400-2/7,HD450,HD512 ... ,HD550-1/5/6/7,HD700-5/7,HD770, ... R250,R290,R305-7DAEWOODH60-7,DH130,DH150,DH220-3/5,DH280-3,DH300,DH300-3,DH360,DH400,DH4505. ...