8 PACK This 8 inch Vertical Galvanized Bunk Bracket allows you to vertically mount a 2 in x 4 in or 2 x 6 bunk board. These vertical bunk brackets are very common on flat bottom john boats and skiff boats. They would also be adequate for V-Hull Boats and Jet Ski Trailers. Typically a single axle trailer would have 4 of these mounted to hold up the boat. The 1/2 inch adjustable slotted holes allow for you to fix the height of your bunks to get the right ride height for your boat. If you are needing a different height we also have available the 10 inch Vertical Bunk Bracket Galvanized and 12 inch Vertical Bunk Bracket Galvanized. When mounting this 8 inch Vertical Galvanized Bunk Bracket, mount the flat side to the face of the cross-member, and the open side will face away from the cross-member.