. Compact shape to fit most tanks . Powerful lightweight magnets for easy mounting . Convenient detachable map pocket . Fully expandable when more room is needed . Side pockets to store your smaller items that can be accessed easily . Organizer under lid conveniently stores pens, maps, keys, cell phone, etc… . Adjustable shoulder strap included for easy transporting and use as a tether strap . Measurements 13”L X 9”W X 7.5”H