Custom, Fun & Cool {Big Large Size 16&rdquo; Inch} 13 Pack of Helium & Air Inflatable Mylar Foil Balloons w/ Celebratory Event American Alphabet Happy Birthday Letters Text Design [in Gold] MATERIALS: This item is only made of the best and highest quality materials available to the manufacturer. WARRANTY: These products have a lifetime warranty that is guaranteed by the manufacturer. This means that if the products come with a manufacturer defect upon opening the package you may request replacement from the manufacturer.