The Hit Fitness 3-in-1 Soft Plyo Block incorporates all of the benefits of regular plyometric blocks into one space-saving design. Its high-density foam block construction absorbs impact reducing the risk of injury. Plyometric training allows you to exert maximum force in short intervals, with the goal of increasing muscular power and explosiveness. You get 3 different heights from this piece of equipment: 51cm (20in), 61cm (24in), 75cm (29in). *Official dimensions of the CrossFit games. FEATURES Plyometric Boxes Space-saving 3-in-1 design. Plyometric Block made from high-density foam blocks. Absorbs impact and reduces the shock on your hips, knees, and ankles. Covered with durable, non-skid vinyl. Perfect for introducing beginners to plyometrics at your facility. Size: 51cm (20in) x 61cm (24in) x 75cm (29in). Colour: Black/Red/Yellow/Blue. Sold Singly.