About this item Professional gym-quality plyometric boxes designed to be a fixture in your gym, training room or home for years to come High-strength steel construction provides stability for exercises and resists movement unlike lighter wood and foam boxes Oversized super durable rubber composite surface provides traction to help prevent slipping during high intensity workouts Meister Elite Plyo Boxes are stackable and nest inside one another for easy storage. Upright 90 degree cube design allows for true vertical box jumps