Embrace the modern flair with our Balloonify Black Mylar Letter W Balloon. Use this party balloon shaped as a W to enhance celebrations by pairing it with our other Balloonify letter and number balloons. Constructed using mylar, this custom balloon is moistureproof and durable, making it reusable. Designed with a self-sealing design, this metallic balloon seals the valve to stop air from leaking. This mylar balloon is inflatable with a manual or automatic pump to speed up the process. To complement all types and shades of decor, this graduation balloon features a shiny black finish. Easily hang this letter balloon using its built-in hanging loop. Measuring 16 inches in length, this foil balloon can be inflated with air or helium. 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) is available and sold separately.