Rainbow Heart Foil Balloon. Decorate your Pride party with this beautiful balloon. Size: 46 cm. Material: coated foil balloon. Suitable for air and helium fillings. Helium requirement: 12 liters for 1 balloon. Maximum floating time: 5-10 days with helium, several weeks with air filling. Load capacity: approximately 2-4 grams. Tip: You can refill with breath through the adhesive valve using a straw. This will restore the balloon's full buoyancy. Give it a try and extend the floating time! Valve: integrated automatic sealing valve (inflate - press valve shut - done), repeatable several times.