uxcell 10 Pcs 16mm x 2mm Mechanical Rubber O Ring Oil Seal Gaskets Product Name : Oil Seal O Ring;Material : Rubber External Diameter : 16mm / 0.63";Inner Diameter : 12mm/ 0.47" Thickness : 2mm/ 0.078";Color : Black Weight : 3g Package Content : 10 x Oil Seal O Rings