The Heavy Duty Tuff Box provides heavy-duty, waterproof protection for your valuables, personal electronics and anything else that needs to be stowed away in a safe place. Zerust provides additional protection against moisture and corrosion, making the Heavy Duty Tuff Box suitable for long-term storage of metal tools and sensitive gadgets in any conditions, and has a polycarbonate construction for maximum durability. A clear lid with o-ring seal keeps water out while allowing you to see in. The internal rubberized bumper system reduces shock and muffles sound. Includes pressure release valve for air travel.The Heavy Duty Tuff Box provides heavy-duty, waterproof protection for your valuables, personal electronics and anything else that needs to be stowed away in a safe place. Zerust provides additional protection against moisture and corrosion, making the Heavy Duty Tuff Box suitable for long-term storage of metal tools and sensitive gadgets in any conditions, and has a polycarbonate construction for maximum durability. A clear lid with o-ring seal keeps water out while allowing you to see in. The internal rubberized bumper system reduces shock and muffles sound. Includes pressure release valve for air travel.