Flabbergast your guests with our Balloonify Black Mylar Number 6 Balloon. Combine this party balloon shaped as "6" with other Balloonify numbers and letters to decorate your special occasions. The aluminum black finish of this balloon gives it an elegant look, making your decor classy. With a durable mylar construction, this birthday age balloon is moistureproof, allowing you to conveniently use it for outdoor parties. The self-sealing design of this number balloon ensures no air leakage to maintain the shape of your balloon. Provided with a hanging loop, this helium balloon can be hung on walls or ceilings. This graduation number balloon is reusable for long-lasting use, allowing you to set it up for multiple occasions. To ease the balloon's inflating process, use a hand pump to fill this custom balloon. This happy anniversary balloon can inflate up to 16 inches and can be filled with air or helium. To reuse these balloons, gently deflate, properly store, and carefully reinflate without overfilling. Shipped deflated in a 1 count box. This party balloon can be easily inflated with the included straw, providing you with full control to help eliminate the risk of over-inflation. Electric air balloon pump (SKU: RWP1061) sold separately.