uxcell 20 Pcs 3/4" Outside Diameter Rubber Gasket Washer Seal Rings Product Name : Rubber Washers;Material : Rubber Outside Diameter : 19mm/ 3/4";Inner Diameter : 8.5mm / 3/10" Thickness : 2mm/ 0.08";Color : Clear Weight : 13g Package Content : 20 x Rubber Washers