uxcell 20pcs 12mmx18mmx1.5mm Copper Flat Washer Ring Sealing Fitting Product Name : CopperWasher;Total Size : 12 x 18x 1.5mm/0.5" x 0.7" x 0.06"(InnerDia*OD*T) Material : Copper Color : Copper Tone Net Weight : 33g Package Content : 20x Copper Washers