Marine-Grade Fire Protection a 12X more corrosion resistance than industry saltwater test standards a Stainless steel and aluminum construction a 12-year service-free design a Easy-to-read gauge tells you fire extinguisher is charged and ready for use a Clear instruction label using graphics to show steps required to operate extinguisher a Easy-to-pull safety pin a Easy and reliable operation a 12-year exclusive warranty a Lowest cost of ownership a US Coast Guard approved with included mounting bracket a Supplied with retention strap bracket a Sodium Bicarbonate a 6 year limited warranty a Suitable for use on liquid & energized electrical fires Kidde Mariner models meet or exceed the required USCG 5-B rating a USCG approved fire extinguishers are required on boats when any of the following conditions exist: (Source: 46 CFR A 25.30) a There are closed compartments and compartments under seats where portable fuel tanks may be stored. a There are double bottoms not sealed to the hull, or which are not completely filled with flotation materials. a There are closed living spaces or closed stowage compartments in which combustible or flammable materials are stored.