16" Congrats Balloon Kit Silver Color. Kit contains all the letters to spell "CONGRATS" in silver color and sold in uninflated condition only. This is a special mini shape balloon kit with self-sealing hole. These kits are for air-fill use only, the balloons will not float if inflated with helium gas. A ribbon for hanging and straw for inflating are included in the package. Fill these self-sealing balloons with normal air using a hand pump, air inflator, or even a straw. Heat sealer machine (as required in normal air filled balloons) is not required. Attach to walls with adhesive or attach grip-tabs to the back and hang anywhere.