Provides an extra measure of safety and peace of mind. Heavy-duty 3/4" thick plywood boxes have a durable rubber landing surface that delivers nonslip traction and impact-absorption for the toughest training regimen. Boxes stack and nest for storage. Set includes three 20"H boxes, one 32"H box, and one reversible booster box that adds 3" or 8" to height. Supports users up to 300 lb. Fully assembled. 235 lb total. Truck delivery.