Quantity: 1 Accent your borthday or construction themed party with this 18 square Happy Birthday Digger foil mylar balloon. The perfect balloon for your borthday or construction party this 18 Kaleidoscope 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. 18 Happy Birthday Digger Balloon by Kaleidoscope