O-Ring, Clear Urethane Size: 908, Durometer: 70 Nominal Dimensions: Inner Diameter: 38/59(0.644) Inches (1.63576Cm), Outer Diameter: 9/11(0.818) Inches (2.07772Cm), Cross Section: 2/23(0.087) Inches (2.21mm) Part Number: OR70CLRURE908