These billet aluminum self-bailing bilge drains are designed to
attach to the
back of the hull over the drain hole. By incorporating a one-way rubber
style flap they allow water to exit the boat while underway, yet
restrict the
water from entering the while stopped.
This drain measures 2" X 2" with a 1-1/2" center drain hole. Bolt Holes are 1.340" center to center.