Plyometric platforms have become one of the most important training devices in gyms today * Great for improving explosiveness, speed and vertical jump * Proper plyometric training will help minimize muscle strain and injury * Platforms are constructed of 1 in. diameter 16 gauge steel tubing with powder coated finish and a 3/4 in. plywood top covered with heavy non skid rubber * For indoor or outdoor use Jumping on and off boxes is one of the best plyometric exercises to improve leg power, speed, and strength. Each box is constructed of 1" square steel tubing. The top platform is covered with 10 mm thick rubber track surface. Anti-skid rubber is located at base corners to prevent slipping and to protect floors. Tapered design allows for much greater stability, and easy stacking for storage. Lifetime warranty on all welds.Please Note: This item CANNOT ship to P.O. Boxes, APO, or FPO Addresses. It CAN ONLY ship to a Street Address.