Let your guests go speechless with our Balloonify Rose Gold Mylar Number 1 Balloon. Styled in the shape of the number "1," this mylar balloon fits perfectly with other Balloonify numbers and letters to customize your phrases. The durable mylar construction of this custom balloon allows it to be reused for a long time without any compromise in quality. Plus, this helium balloon is moistureproof to withstand humid conditions. With a built-in hanging loops, you can conveniently hang this happy anniversary balloon on surfaces. The elegant rose gold finish of this graduation balloon allows you to blend it with any themed party decor. With a self-sealing valve design, this mylar balloon maintains its shape and size throughout the event. To make the inflation process quick, this foil balloon can be filled with air or helium using a pump. This number balloon is perfect for weddings, birthdays, or graduation parties and measures 40 inches when inflated. 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.