Length 24″. The 2×4 black carpeted bunk boards are offered in 24″ or 60″ lengths. Posts can be mounted 5″ – 11″ on the side of the frame. If mounted above the frame, bunk placement is 19″ high. U-bolt & nuts are zinc plated and mounting hardware is galvanized for corrosion protection. Kit fits frames 2″ and 3″ wide up to 4″ high. Sold in pairs with all mounting hardware included.