uxcell 3x40mm Nitrile Rubber O Type Sealing Ring Gasket Grommets Black 10 Pcs Product Name : Oil Seal O Ring;Material : Nitrile Rubber External Diameter : 40mm / 1.57";Inner Diameter : 34mm / 1.34" Thickness : 3mm / 0.118";Color : Black Weight : 13g Package Content : 10 x Oil Seal O Rings