Celebrate in vibrant style with the 17" Airfill Only Happy Birthday Rainbow Kit Foil Balloons. This kit includes 13 letter-shaped foil balloons that spell out "HAPPY BIRTHDAY" in a stunning rainbow gradient of colors, including shades of pink, yellow, green, and blue. These balloons are perfect for adding a festive touch to any birthday celebration. Designed for air inflation only, these high-quality foil balloons can be easily hung or stuck on walls to create a cheerful and colorful backdrop. Make your special occasion unforgettable with these eye-catching and fun decorations.