Materials: Aluminum Foil Letters: 13pcs Color: Multicolor optional Size : 16inch/pcs Package : ①Happy Birthday letters x13pcs(16inch) Tip : ① The letter "B" design is special ,before inflating it looks like the letter "C" after inflating, it is letter "B". ② All Aluminum Foil Balloons are detected by the machines , If air leak occurs while inflating, please press the inflatable hole or use tape to assist the automatic sealing of the balloon. Large Birthday Banner Balloons – Designed with big 16” foil letters, this happy birthday sign lets you celebrate special moments with children, friends, and family. Bright, Vibrant Gold Mylar – Our premium quality balloons are crafted with a durable, ultra-shiny aluminum foil that maintains form without leaking or losing air. Perfect Party Decoration – Hang these giant foil birthday balloons in the kitchen, living room, or party room and show the birthday boy or girl how much you care! Smart, Reusable Design – These easy to inflate and delate party balloons can be used every year with proper care and maintenance. Simply store them away for future use. Any problem or you need help, Kindly contact with us , we will solve it for you at once.