Designed for use with AAI's quick release SBT , wall mounted horizontal bar and the cabled SBT . Stainless steel horizontal bar with twin collars Quality equipment your athletes deserve. Since 1954. Horizontal Bar Safety Notice Based on data supplied by the FIG Safety Symposium, AAI strongly recommends that the horizontal bars and mounting collars be examined for wear on a regular basis, and be replaced every three 3 years, to reduce the possibility of breakage. The newer moves being performed are applying greater impact loads and vibrations on the bar. 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 urethan