Decorate your graduation or congratulations themed party with this 45cm round Bold Congratulations Balloons foil mylar balloon. The perfect balloon for your graduation or congratulations party, this 45cm Anagram 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.