Create a cute birthday background photo prop with our Balloonify Gold Mylar Number 4 Balloon. Fashioned in the shape of '4,' this custom balloon is pairable with our other Balloonify number and letter balloons. Manufactured with mylar, this party balloon is moistureproof, making it ideal for outdoor use. This long-lasting metallic balloon can be re-inflated and reused. To speed up the inflation of this mylar balloon, use a hand pump. This graduation balloon has a self-sealing valve that keeps it inflated until you deflate it. Featuring a gold foil finish, this number will go perfectly with your gold-themed parties. This birthday balloon's hanging loops allows it to be hung from walls and ceilings for simplicity. Measuring 40 inches in length, this foil balloon can be inflated with air or helium. To reuse this balloon, 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) is available and sold separately.