About this item High Quality Product: This happy birthday balloon is made of aluminum, sturdy,It also can be reused and is suitable for a variety of occasions as party decoration Package Includes: The package includes 13 letter balloons. straw and a white string.To assemble the balloon, insert the straw into the opening and blow, or use a balloon pump to blow Good for Various Occasions: The lovely happy birthday balloons are suitable for many occasions. Whether it’s indoor living room or outdoor garden, the nice decoration can add more color and fun to the party