Extreme Max 3005.3783 Heavy-Duty Pontoon Trailer Guide-On System, 2 Pack Set of two heavy-duty pontoon guide-ons for improved overall loading and stability 2.5" industrial-grade steel frame with non-marking PVC coating; 30" overall height Zinc-coated for freshwater corrosion-resistance, not intended for use in saltwater or brackish water Designed to install easily over 2" x 2" cross members Hardware kits are available for trailers up to 2" wide x 6" tall - Order Extreme Max part number 3005.3784 Two-year replacement warranty