A Ready Space Saver Extended Range Fuel Bladder™, or Boat Bladder, takes up 40% less deck space than other fuel bladders, yet it still gives you the ability to make longer runs to reach the best fishing spots or cruise further without making time-consuming fuel stops. All standard model Ready Space Saver Fuel Bladders come with a 3/4” ball valve and 2″ vented standpipe for the fill. Standard fuel tanks are meant for diesel fuel or gasoline, but please contact us for questions on storing other liquids.