Astound everyone at events using our Balloonify Black Mylar Number 7 Balloon. Crafted into the shape of the number "7", this foil balloon lets you join it with other Balloonify numbers and letters to create incredible decors. The durable mylar material of this birthday balloon makes it moistureproof and sturdy for long-lasting use. With a classy black finish, this number balloon complements any stage backdrop. Hang this helium balloon on the walls, as they come with a hanging loop. This reusable anniversary number balloon is designed with a self-sealing feature, ensuring no leakage of air. This helium-quality party balloon measures 16 inches when inflated and can be set up using a hand pump. 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.