Custom, Fun & Cool {Big Large 11"-18&rdquo; Inch} 20 Pack of Helium & Air Inflatable Mylar/Latex Balloons w/ Damask Hearts Swirl Design [in Dark Green, White & Black] 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.