Helium tank kit includes helium tank with 8.9 cubic feet of helium/air mixture, 30 assorted color 9” latex balloons and a spool of white ribbon. Helium tank is ready to use; no assembly required. The 9.5” standard tank inflates up to 30, 9” balloons (included). Perfect for any occasion at home or on-the-go. Inflate balloons 1-2 hours before event; average float time is 5-7 hours. Rotate green value 4 full turns. Place the balloon on the black nozzle; hold in place. Gently press down near the end of the nozzle to release helium. Fill latex balloons to an egg shape, not a light bulb shape, for best performance. Close valve securely to store unused helium for future events.