Impress your guests with showstopping balloon decor with our Balloonify Silver Mylar Number 6 Balloon. To create personalized messages, combine this mylar letter balloon shaped like the number '6' with other Ballonify numbers and letters. This birthday letter balloon is made of mylar and is moistureproof, making it ideal for outdoors use. With its durable and reusable design, this balloon can be used for all kinds of parties repeatedly. Easily inflate this balloon decoration using a hand pump to save time. With a self-sealing valve, this party balloon ensures maximum float life, avoiding air leakage. Conveniently hang this custom balloon using the built-in hanging loops. This happy anniversary balloon is suitable for air and helium inflation. Adorning a sleek silver shade, this helium balloon exudes a classy touch to your event decor. This happy anniversary balloon measures 40 inches in length. 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.