Guide your boat onto your trailer with proper centering in windy conditions or strong currents by using these Bunkboard-Style Boat Guide-Ons from Overton's. Covered with marine-grade carpet, these bunkboard-style boat guide-ons cradle your boat, protecting it from scratches and dings. Mounting tubes are pre-galvanized steel. Mounting hardware is included with the Overton's boat guide-ons. Fit up to 4-1/4" trailer frame. Mount 19" above trailer frame with side adjustment out to 11". Sold in pairs. Trailer is not included. Please note: Guide-Ons are not designed for use with Jon Boat applications.