Unbreakable, waterproof, dust resistant, chemical resistant and corrosion proof black case. Made of ultra high impact structural co-polymer. Outside dimensions: 52 in. L x 17 1/2 in. W x 6 in. D. With wheels. Weighs 29 pounds. Its exclusive 1/4 in. (6.4 mm) neoprene o-ring and ABS latches seal perfectly and includes an automatic purge valve for quick equalization after changes in atmospheric pressure. It has transport wheels for better handling.