LOONBALLOON Pirates Balloons, 41 inch PIRATE SHIP BIRTHDAY, Accent your pirate themed party with this 41in. large unique shape Pirate Ship – Black foil mylar balloon. The perfect balloon for your pirate party, this 41in. party balloon is great for setting the scene! This balloon includes a self-sealing valve, preventing the gas from escaping after it’s inflated. The balloon can be inflated with helium to float or with a balloon air inflator. Balloon arrives uninflated. 41in. Pirate Ship – Black Foil Mylar Balloon