Includes workout guide. Durable non-slip jumping surface. Adjusts to four different heights: 12, 16, 20 and 24 in.. Warranty: One year for frame and 90 days for parts. Made from steel and rubber. Red and black color. No assembly required. 27 in. L x 18 in. W x 24 in. H (40 lbs.). Plyometric training is used to develop speed, power, agility, and explosiveness. This high-intensity training uses both your upper and lower body to work together to create a powerful movement which builds strength and endurance. The Stamina X plyo box adjusts to four different heights allowing you to progressively increase the intensity of your training. this space saving adjustable height plyometric box is perfect for home gyms.