These balloons are perfect for decorating a 20th birthday party! This pack features 6 assorted colours of balloons that’s sure to brighten up any venue. They’re a popular choice for customers who only want minimal decoration at their event. Supplied uninflated. (Colours will vary) AIR INSTRUCTIONS: We recommend carefully inflating balloons with a balloon pump .They also look great filled with helium . Helium in a latex balloon will have a limited life span of up to 8 hours, inflation should be done as close to the event as possible. This life span may change in direct sunlight and warm temperatures.