Spin lock adjustments for four 4 different height settings 30 58', 34 58', 38 58' and 42 58' 780, 880, 980 and 1080mm Steel core covered with 100 gauge suede like material Base and uprights finished in powder coat blue Beam dimensions 12' long 3.6m with a 4' 100mm working surface Quality equipment your athletes deserve. Since 1954. As an official supplier of gymnastics equipment to USA Gymnastics, AAI is proud of its continuing commitment to the development of gymnastics through participation in hundreds of National, State, Regional and local events affiliated with the USAG. AAI is the longest running partner in USAG's history. Warning American Athletic, Inc. apparatus is designed to site on a hard flat surface such as concrete, wood, or urethane flooring, when in use. Placing any apparatus on top of matting, including base foam, can destabilize or alter the intended performance of the apparatus potentially resulting in catastrophic injury to the user. Gymnastic