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 and a detailed guide to construction and training Each pack includes 2 small, 2 medium, 2 large rungs Great for training, these wooden campus board rungs are unsurpassed for feel and consistency. Custom tooling, as well as being hand sanded, gives these rungs comfortable a smooth shape.