Product details:

Long days on the water shouldn't be followed by an ordeal when it's time to load your boat. Trailer guide-ons do more than help you get your boat on your trailer: they prevent a multitude of loading problems. Guide-ons keep you from loading too deep, keep your trailer position true, and are especially helpful at night. They'll help you load faster and safer, especially at crowded launches and might even save your relationship (just kidding, that last part's kinda up to you). Tall, easily visible, PVC-covered 40-inch steel posts work on bunk or roller style trailers with gusseted weld brackets in the corners for added strength. Designed for marine use with corrosion resistant construction and hardware. Note: Included hardware will fit trailer frames up to three inches (7.62cm) wide by 4-1/4 inches (10.795cm) high. If you have a larger trailer frame, please order one of the following hardware kits: 3005.4050 fits trailer frames up to 5-1/4 inches (13.33cm) high.