Fun and challenging rotational training tool designed to build muscular strength, endurance and balance. Improves mental stamina, balance and proprioception for increased control and agility both on and off the bike. Teaches the mechanics of mastering balance, rotational spins and gain mastery of spatial awareness. Sturdy Canadian maple concave skateboard deck with HDPE custom molded center balance ball and smaller billiard ball style dual nose/tail balance caps. Use indoors or outdoors. 8.25” x 31.9” x 3.5”. 5lb 3 oz.