BALLOONS SPECIFICATION: Metallic balloons is the classic and most popular balloons. The chrome metallic color is the upgraded version this year. We packaged 20 pcs per pack BRIGHT COLOR & STAY TIME: These beautiful chrome balloons can be filled with air or helium. The long-lasting balloons filled with air will stay fulll for a month and helium lasts for 8 to 10 hours QUALITY & APPLICATIONS: These chrome metallic latex balloons are durable and 20% thicker than average latex balloons Perfect to make balloon bouquets, arches, balloon arrangements, and for all kinds of kids and adults parties ATTENTION & WARNING: Certain color difference occurs after Oxidation. Please DO NOT overfill the balloons and also avoid sunburn, overheat, pointed object and excessive friction Colour: Gold