guide wheel 1.Material:NO.45 steel 2.Usage:excavator parts Excavator Sprocket & Segment SH200 SprocketSprocket & Segment models: KOMATSUPC400-6,7,PC360- ... -2/3/5,EX300-5,EX300-1/2/3,EX200-5,EX200-2/3,EX200-1,EX120,EX100,EX90,EX70, EX60,EX55,ZX330 ...