Save up to 40% on your Helium Costs with Conwin 60/40 Helium Air Balloon Inflators. Simply attach the Helium Inflator to your Helium Balloon Tank, and inflate Latex Balloons as usual. The Inflator will automatically mix the balloon with 40% Air from the atmosphere as you inflate via the air intake valve. Want to fill a few balloons with just Helium? No problem! Just cover the Inflation Air Intake Valve opening with your finger as you inflate, and there you go! 60/40 only works with Latex Balloons (not Foil Balloons).