Wooden campus board rungs are unsurpassed for feel and consistency. Custom tooling gives these rungs comfortable smooth shapes. Individually hand sanded. Each rung has an incut side and a flat side. 16 length fits evenly on 4 ft. or 8 ft. panels. Pre-drilled. Includes mounting hardware. Includes detailed guide to construction and training. Small: 3/4" (19 mm) thick. Medium: 1" (25 mm) thick. Large: 1-1/4" (32 mm) thick"