16" Happy Birthday Balloon Kit Silver Color. This is a special mini shape balloon kit with self-sealing hole. Sold in uninflated condition only. 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 & hang anywhere. Balloon cup holder and stick is not included.