Constructed of top quality 1 12' 38mm diameter manila rope. Standard lengths of 24' 7.3M All ropes come with steel top clamps installed, ready for attachment to ceiling clamps not included 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 apparatus, accessories, and mats are designed using materials that will wear with use over time. A