uxcell 2.5x75mm Black Nitrile Rubber Sealing O Ring Seal Grommets 10 Pcs Product Name : Oil Seal O Ring;Material : Nitrile Rubber External Diameter : 75mm / 2.95";Inner Diameter : 70mm / 2.76" Thickness : 2.5mm / 0.098";Color : Black Weight : 15g Package Content : 10 x Oil Seal O Rings