Four (4) Replacement 10" Upright Bunk Board Brackets Ideal for Mounting Bunk Boards To Ski Boat, Fishing Boat, Jet Ski, Or Sailboat Trailers & More Tech Info: 10" Heavy Duty Galvanized Steel.Used for mounting Bunk Boards to Trailers.Slotted for Vertical Adjustment.Dimpled to help prevent pivoting of Bracket.Stops Rust. Replaces Part Number: 4-10