6pcs set Party Decoration foil balloon (five pcs 18inch star shaped & 32inch Number "8"). Long Lasting Balloons: Made of high quality aluminum foil, thick and auto-sealing, no leaks, can last for weeks when inflated. You can use the pump or straw to blow the balloon.When the inflation is completed, please put the ball to pinch flat, the ball comes automatically sealing glue Its durable and does not burst like rubber balloons. It can be self inflated using a straw. Excellent Option for Birthday Party Decorations - Size : Number size 32 inch(81CM), Color: Gold & Star balloon size 18 Inch (45cm) Color : Multi Please note, if you find foil balloons in wrinkle condition due to tight packing/shipping don’t worry, once fill with air completely, no wrinkle would be visible. After 5-7 days if you think air pressure is little low, please fill with more air and enjoy using it. Do not worried about the thickness of the balloons, it is made with very good quality of material and it’s very thin due to his basic nature character. Party Decoration foil balloon (five pcs 18inch/45cm star shaped & 32inch/85cm Number "9"). Material: Aluminum Film, Foil balloons can be repeated use, convenient to Inflation and Deflation.