LOONBALLOON Ocean Ballons, 42 inch Large Size DELIGHTFUL DOLPHIN, Accent your ocean themed party with this 42in. shaped Delightful Dolphin foil mylar balloon. The perfect balloon for your ocean party, this 42in. 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. 42in. Delightful Dolphin Balloon