1.komatsu excavator PC400-7 radiator hose, 2.the part number is 208-03-71321 & 208-03-71331, 3.the komatsu original part. 1.komatsu excavator PC400-7 radiator hose,2.the part number is 208-03-71321 & 208-03-71331,3.the komatsu original part. PC400-7 radiator hose 208-03-71321 & 208-03-71331