These colorful foam filled products promote the development of the basic fundamentals of recreational activities that is fun for all children. They will be stimulated to expand their agility, flexibility, strength, timing and coordination. Instructors can create their own circuit to fit their specific program needs. A must for teaching back handspring basics. cover material is 18 oz. vinyl Filler is high density polyurethane foam Includes the following sizes Small handspring trainer 32' 80cm greenyellow Medium handspring trainer 36' 90cm royalyellow Large handspring trainer 40' 100cm purpleyellow Also available, but sold separately X Large handspring trainer 44' 110cm limeyellow 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