31NB-19110 This used for  EXCAVATOR,  Original new and china could offer and With 3-12 months warranty

31QB-16110 31QB16110 R480-9 R520-9 and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Hydraulic Pump used for excavator Hyundai

OTTO 31QB-16110 31QB16110 R480-9 R520-9 Control Valve Excavator This Control Valve used for excavator Hyundai, Original new and rebuild could offer and With 6-12 months warranty