This air vent extender perfectly fits 10 in. or 12 in. registers. With its flexible extension feature, it can stretch from 17 in. to 33 in. Standing at a mere 1.25 in. height, it can be easily placed under various pieces of furniture such as sofas, dressers, chairs, and beds without affecting furniture arrangement. Crafted from high-quality 1.5mm thick PET plastic, the product has undergone rigorous testing to withstand high temperatures. It offers both flexibility and long-lasting durability, ensuring stable performance over an extended period. Equipped with three powerful neodymium magnets, it securely attaches to any metal vent register, providing a convenient and stable installation. By redirecting the airflow, it prevents warm and cold air from being blocked by furniture, enabling efficient year-round ventilation and helping to reduce heating and cooling costs.