The Pelican 1690 Transport Case is watertight, crushproof, and dust proof. It is so large is comes with heavy duty quad wheel and retractable pull handle. The case made for ease in pulling your heavy load. Pelican 1690 Transport Case also has two person lift handles. This case holds a huge load. As we said it is unbreakable, watertight, dust-proof, chemical resistant and corrosion proof. Your equipment can fit into the padded dividers for total subjection and protection against impact, vibration or shock. This is because the Pelican 1690 Transport case is made of Ultra High Impact structural copolymer that makes it extremely strong and durable. Its exclusive 1/4" (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. Retractable extension handles. 4 strong polyurethane wheels with stainless steel bearings.