Qualatex Mousehead 15" Latex Balloons x 5 - Yellow Made by Qualatex - The Choice of Professionals. Suitable for helium or air - Supplied flat To inflate Mousehead balloons - Put the inflation nozzle so that the nozzle tip is at the base of one of the ears. Place your index finer and middle finger between the ears and inflate the first ear,Move the nozzle tip to the base of the other ear and inflate. Once the ears are inflated allow the rest of the balloon to inflate from the top down,For best results when using helium use a flex tip valve. When inflating with air use a pump - do not inflate by mouth.