1.Nozzle Piping 2.Application: Excavator 3.Model&Engine: 6D31 4.Co. ... , Couplings, Pushers, Injectors, Bushings, Cylinders, Hydraulic Pumps, Undercarriages parts. Providing high quality products and good service to our customers is the faith ... best service based on professional and sincerely attitude ! 6D31 Excavator high pressure Nozzle Piping