... for supporting oem parts including track roller,top roller,idler,sprocket,segments,track link,track link assy,tensional assembly:Komatsu:D20 ... ,320C, 322,325,330, 240,240B(MS180), 312,450Hitachi:EX60,EX100,EX100-1/2/3/5,EX120,EX150,EX150-1,EX200-1 ... ,320LC,335,450Kubota:U-35-3, U-50-3Liebherr:R912 sprocket for hitachi ex100