O-ring, 70 x 3.0 mm – Buna, Part# 91311900000 – vacstellar

this Buna O-ring (Part# 91311900000). with dimensions of 70mm (ID) x 3.0mm (CS), this high-quality O-ring is a direct OEM replacement. It is designed for a perfect fit on a remarkably wide range of U Series models, including U4.70, U4.70D, U4.70E, U4.70F, U4.70G, U4.70H, U4.100, U4.100D, U4.100F, U4.100G, and U4.100H pumps . Its primary function is to create an airtight seal between mating components, which is essential for maintaining proper vacuum levels and preventing oil leaks.This O-ring, 70 x 3.0 mm – Buna, Part# 91311900000 is the exact replacement part you need. It is made from Buna-N (Nitrile), a material specifically chosen for its excellent resistance to oils, fuels, and other petroleum-based fluids . It stands up well to the tough conditions inside your pump.