VERSATILE DECORATION: These metallic letter balloons are perfect for a variety of celebrations, from birthdays to weddings to graduation parties. PERSONALIZE YOUR PARTY: Spell out a custom greeting or the guest of honor's name to add a special touch to your party decorations. EASY TO USE: These metallic letter balloons are self-sealing, making inflation quick and easy – no helium required. HIGH-QUALITY FINISH: The metallic sheen of these balloons adds a touch of elegance to any event. DURABLE MATERIAL: Made from high-quality aluminum foil, these balloons resist punctures and deflation. LIGHTWEIGHT AND PORTABLE: These balloons are lightweight and easy to transport, making them perfect for on-the-go party planning. REUSABLE: These metallic letter balloons can be deflated and reused for future events, saving you money and reducing waste. REGARDING INFLATION: All balloons filled with air will not float, only when filled with helium can they float. Helium is an inert gas that is expensive but very safe. If you don't have helium, you need to buy a hand pump or a foot pump. The inflation rate of aluminum balloons is generally about 70%. Do not inflate too much to avoid damaging the balloon, affecting use, and wasting the balloon. REGARDING RETURNS AND EXCHANGES: For quality problems, please take photos and confirm with our customer service before returning or exchanging. Generally, the intact rate of a package of balloons is about 98%, and some air leakage is a normal phenomenon. Customers who return or exchange for reasons other than quality problems must bear the shipping cost. Customized products are special and cannot be returned or exchanged. Please note this.