Transom Drain Tube & Plug from MOELLER
This nylon drain tube won't rot, bend or mildew, fits flush to your transom, and allows water to drain when your vessel is trailered. A rubber O-ring makes a watertight seal. Can be loosened with a flat-head screwdriver. Fits 1 1/8'' openings. Mounted with rivets or #8 fasteners.