The Forespar outboard well drain offers acorrosion proof, easy-to-install replacement for the old fashioned brass fitting. Can also be used as a chafe guard to lead hose, wiring,steering cables, etc. through bulkheads, floor timbers and fiberglass panels. Barbs on O.D.ensure positive locking action. Designed to fit 1" diameter hole. Flange is 1-1/4" dia. Usable length is 2-1/2".