Extreme Max 30053828 Carpeted Vertical Bunk GuideOn System

Includes a pair of vertical carpet-padded boat trailer guide-ons, perfect for low-profile or fishing boats, Adjust horizontally up to 6" on a 3" trailer frame or 8" on a 2" frame, Zinc-coated for freshwater use, not intended for use in saltwater or brackish water, Easy bolt-on installation fits bunk or roller-style trailer frames up to 3" wide x 4.5" tall*, 7" bolt kits are available for trailer frames up to 5.5" tall, see Extreme Max 3005.4062