Guide your boat onto your trailer with proper centering even in windy conditions or strong currents. Covered with marine-grade carpet, these bunkboards cradle your boat protecting it from scratches and dings. All hardware and mounting tubes are hot-dipped galvanized for protection against corrosion. Fit up to 4-1/4" trailer frame. Mount 21" above trailer frame with side adjustment out to 13". Mounting hardware included. Sold in pairs. Additional $5.00 shipping charge.