10pcs 13mm Inner Dia 1.5mm Thickness Copper Flat Washer Seal Fitting Product Name : CopperWasher;Total Size : 13 x 18 x 1.5mm/0.5" x 0.7" x 0.06"(InnerDia*OD*T) Material : Copper Color : Copper Tone Net Weight : 14g Package Content : 10 x Copper Washers