31N8-40050BG 31N8-40051BG  31N840050BG 31N840051BG R290-7 Original new and rebuild could offer and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model swing motor used for excavator JCB

31N8-40051BG 31N8-40052 31N840051BG 31N840052 R305-7 Original new and rebuild could offer and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model swing motor used for excavator JCB

OTTO 31N8-40050BG 31N8-40051BG 31N840050BG 31N840051BG R290-7A Excavator Final Drive This Final Drive used for excavator Hyundai, Original new and rebuild could offer and With 6-12 months warranty

OTTO 31N8-40051BG 31N8-40052 31N840051BG 31N840052 R300-7 Excavator Final Drive This Final Drive used for excavator Hyundai, Original new and rebuild could offer and With 6-12 months warranty