About this item Package include 40 inch silver number balloons 2 and 8 with straw, each balloon has undergone rigorous testing to reduce the defect rate as much as possible. Self sealing large foil number balloons easy to inflate, can be filled with helium at your local store or use a straw to fill up with air, can stay inflated for several days, and there are several holes on the top to string together or to hang. Number mylar balloon, made of high-quality aluminum film. Thicker and stay…