uxcell 30 Pcs 22mm x 18mm x 2mm Rubber Oil Sealing O Rings for Mechanical Product Name : O Ring;Material : Rubber Outside Diameter(Approx.) : 22mm/ 0.86";Inside Diameter(Approx.) : 18mm/ 0.7" Thickness(Approx.) : 2mm/ 0.078";Color : Black Weight : 8g Package Content : 30 Pcs x Rubber O Ring