18" Multi-purpose dry box features molded-in Zerust, a flip-top easy access lid, lift-out tray and a 360 degree O ring that helps keep your contents dry. Perfect for the boat, dock, pier or bank excursions. Zerust has proven to be the absolute best way to protect your tackle against rust and corrosion. Molded into our Tuff Tainer dividers, this patented polymer emits a harmless vapor, forming a protective layer around metal surfaces. All Zerust products will maintain their effectiveness for up to five years or more, so you can count on hassle free, long lasting protection.