Strike awe to your guests with our Balloonify Black Mylar Number 8 Balloon. Styled in the shape of the number "8", this party balloon can be used with other Balloonify letters and numbers. This durable mylar number balloon is moistureproof and won't pop easily, allowing you to use it for outdoor events. With a self-sealing design, this reusable custom balloon is airtight, maintaining its shape and size for a long time. Fill this balloon decoration with air using a hand pump to simplify the inflating process. This helium-quality birthday balloon has a classy black finish that goes well with any themed party or event. With a hanging loop, this graduation balloon allows you to place it on the walls. Measuring up to 16 inches when inflated, this happy anniversary balloon is a great addition to your weddings, birthdays, or gatherings. 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.