Seachoice 18271 Boat Self-Bailing Cockpit Mounted 2-7/8-Inch Scupper Valve Kit, Clear Efficiently drains water from self bailing cockpitsDesigned to be mounted over existing thru-hull fittings with 3/4 inch to 1-1/2 inch openingsDiameter: 2-7/8 inchColor: ClearAccepts 6 (six) #8 fasteners