Our Silver Happy Birthday Balloon Kit is the perfect way to decorate for a milestone birthday. Silver is an excellent way to compliment any birthday color scheme. Each kit comes with 13 silver mylar letters, 40 glue dots, and 4 inflating straws. Each 16" high letter of "Happy Birthday" can be filled with either air or helium. Use the self adhesive glue dots to stick each letter to a wall or cabinet.