uxcell 5 Pcs 25mm 1" Outside Dia. Rubber Oil Seal Sealing O Ring Gaskets Product Name : Oil Seal O Ring;Material : Rubber External Diameter(Approx.) : 25mm / 1";Inner Diameter(Approx.) : 18.6mm/ 0.73" Thickness(Approx.) : 3mm/ 0.12";Color : Black Weight : 4g Package Content : 5 x Oil Seal O Rings