Load your boat even in wind or side currents. Our Bunk Guide-Ons line the boat up straight and keep it that way. Bunks are made of strong injection-molded composite material and durable, polypropylene carpeting. Two-piece design eliminates staples and makes replacing worn carpet easy. Frame is heavy-gauge, 1-1/2" square steel tubing and adjusts as far as 6" on each side. Mounting bracket adjusts to fit a trailer frame up to 2"W x 5"H bracket spacing. Made in USA. Per pair. Colors: White (not shown) or Black Painted, Galvanized (not shown).