LOONBALLOON Alien, Space, Earth Theme Balloons, 29 ROCKET SHIP, 4 Pearl White Latex Set, Accent your space themed party with this 29in. large Rocket Ship foil mylar balloon. The perfect balloon for your space party, this 29in. 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.