Balloon Time helium balloon tanks are ready to use straight out of the box . making it quick and easy to inflate balloons for any type of celebration ?C anytime . anywhere. Helium tanks are ideal for inflating latex or foil balloons for birthday parties . receptions . graduations . open houses . school or office events and so much more. Make bouquets . arches or other d??cor for your event using the included colorful latex balloons . or use the helium tank to inflate letter balloons . number balloons . themed or other specialty balloons (sold separately). Balloon Time helium tanks can be safely stored for future use . making them convenient to keep on hand for celebrating at a moment’s notice. Easy to Use: Twist open the green valve counterclockwise four full turns . slide a balloon onto the black nozzle and press nozzle down to start helium flow to fill the balloon. Altitude . temperature and humidity may affect balloon float time. When done . twist the green valve closed to store leftover helium for future events. Tank is recyclable when empty. For best results: Inflate balloons immediately before event; average float time is 5-7 hours.