Extreme Max Heavy-Duty Pontoon Trailer Guide-On Systems do more than help you get your pontoon on your trailer; they help stop a multitude of loading problems. They'll help you load faster and safer, keep you from loading too deep, keep your trailer position true and are especially helpful at night. These guide-ons are designed to work even in high impact conditions like rough water or with large pontoons, with a 30" height that's perfect for pontoons. The 2.5" industrial grade steel frame is covered in non-marking PVC to protect your pontoon's finish and installs easily over 3" wide cross members. Each set includes two guide-ons. Extreme Max Guide-Ons are zinc-coated and intended for freshwater use only.