Example: Qty 1 = 1 Bag of 100 heli valves with ribbon. For use of Helium filled balloons only. Helium valves can be fitted in to the neck of the latex balloons. They are self-sealing with 1m ribbon attached to each one. This is an optional extra but saves time hand knotting after filling with helium. Helium filled balloons will stay afloat for approximately 8 hours.