Universal Boat Trailer Guide: This 61" adjustable bunk board kit ensures seamless compatibility with a wide range of boat trailers, great for ski, fishing, and sailboats. Its adaptable design facilitates effortless centering and loading for vessels of various sizes Effortless & Accurate Boat Loading: Specifically engineered to simplify the loading process, these guide-on rails help perfectly align and center your boat onto the trailer. Achieve stress-free, straight loading every time, whether launching or retrieving Durable, Hull-Safe Engineering: Features a carpet-wrapped wooden bunk board to protect your boat's hull from scratches and abrasions. The heavy-duty steel uprights and swivel brackets are galvanized for maximum strength, durability, protects against damage from saltwater rust Adjustable for a Custom Fit: Offers versatile adjustability with a 75-degree outward slope and a height range of 13" to 21" from the trailer frame on each side. The kit includes sturdy 1.5" square uprights and 2"x4"x60" carpeted boards to fit various setups Complete Installation Kit: Comes as a ready-to-install pair, including both bunk boards, all necessary galvanized brackets, U-bolts, nuts, and clear instructions. Everything you need for a straightforward installation is included in 1 package