Copper automatic transmission fluid drain plug crush washer seal.. Ensuring proper fit with the drain plug and creating a tight seal.. Good for oil changes and oil filter replacements.. This oil drain plug crush gasket washers is for most of car.. O.D.(outside diameter): 20mm / 0.79''; I.D.(inside diameter): 12mm / 0.47''; Thickness: 1mm / 0.04''..
