50pcs 12inch black polka dot lafex balloons. You can use helium hydrogen and air to inflate them. Great for wedding parties, birthday parties, and many other parties and festival occasions. Tips: 1. The ordinary pump blows air and will not float the balloon. If it needs to float, it must be filled with helium (safer) or hydrogen (flammable hazard) 2. Balloons are only suitable for children over 3 years old under adult supervision; Please inflate the balloon with a quality guaranteed air cylinder 3. The balloon will degrade slowly after inflation and will not pollute the environment. The most direct performance is balloon oxidation. The higher the temperature, the more ventilated the place, the faster the oxidation of the balloon. If you want to maintain a lasting effect, it is recommended to use professional antioxidants