uxcell 10 Pcs 50mm OD 2mm Thickness Red Silicone O Ring Oil Seals Product Name : Silicone O Ring;Material : Silicone Outside Diameter : 50mm / 2";Inner Diameter : 46mm / 1.8" Thickness : 2mm/ 0.08";Color : Red Weight : 6g Package Content : 10 x Silicone O Ring