504-1674 511-6019 518-1212 527-7095 527-7096 527-7097 539-0894 519-2480 522-6898 522-6900 511-0317 This used for EXCAVATOR,Original new and china could offer and With 3-12 months warranty

504-1674 511-6019 518-1212 5041674 5116019 5181212 349 em will send free parts to repair. And this model Final Drive used for excavator hitachi

511-6019 513-0978 513-0979 5116019 5130978 5130979 349D2  and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Final Drive used for excavator hitachi