These boxes are built watertight, unbreakable, airtight, dustproof and corrosion proof. There outside shell is made out of ultra high impact, structural copolymer polypropylene. The inside, which is sealed with an O-ring has a neoprene closed cell sponge that can be cut to custom fit what ever you decide to put in it. The exclusive built in O-ring sealed pressure valve allows for quick equalization after changes in altitude or temperature. These boxes are great for storing electronics such as; GPSs, fishfinders, cameras, cell phones, etc.
