The Pelican 1720 Long Case with Foam (OD Green) is an unbreakable, chemical-resistant, corrosion and dustproof, water and airtight hard case used to carry any kind of equipment that needs to be protected from impact damage. It is made from ultra-high-impact structural copolymer to be extremely strong and durable. It has a 0.25" neoprene O-ring, easy-open double-throw latches, and includes an automatic purge valve for quick equalization after changes in atmospheric pressure.