Boland helium tank Blow your balloons on this helium tank and make them float! They take off and stay in the air. Do you want to use them outside? Then hang a lead at the bottom of the rope and fix them in the ground. With this helium tank you can fill up to 30 latex balloons Specifications: Gender: unisex Tank material: steel Quality: 100% helium Age: from 18 years old Floating time latex balloons: 5 to 7 hours Suitable for 30 latex balloons