Quad Ring, Black BUNA/NBR Nitrile Size: 217, Durometer: 70 Nominal Dimensions: Inner Diameter: 1 13/76(1.171) Inches (2.97434Cm), Outer Diameter: 1 22/49(1.449) Inches (3.68046Cm), Cross Section: 5/36(0.139) Inches (3.53mm) Part Number: XP70BUN217