Innovative, irresistible design includes a cave-like interior that encourages kids to climb up and across the walls. Tough yet lightweight thermoplastic-coated aluminum shell. Powder-coated steel climbing rungs. Meets ASTM and CPSC guidelines. A 17' x 18' use zone is recommended. Assembly and in-ground installation required. 5'L x 5'9"W x 5'H; 400 lb. Truck delivery.