This pelican 1640 transport case is an unbreakable watertight crushproof airtight dustproof chemical resistant and corrosion proof hard caseit is made of ultra high impact structural copolymer that makes it extremely strong and durable it has a 64 mm neoprene o ring easy open double throw latches with stainless steel hasp protectors provide added strength and extra security it also has a built in pressure equalization valve for changes in altitude or temperature it comes comes with a