Features a tear resistant material bonded to a metal washer. Fits the metric gearcase drain screw found on Mercury/Mariner outboards F2.5/3.5 hp. (MY 2006 and newer) F4/5/6 hp. (MY 2002 and newer) F8/9.9 hp. (MY 2005 and newer) F15/20 hp. (351cc MY 2008 and newer) and the F25/30 hp. (EFI MY 2006 and newer).