Feature●Extendable and easy to install at the site even in difficult construction●It is compact and flexible so please stretch it out when using. Stretches to a length of about 13.4 ft (4 m)●It is lightweight and non-flammable, making it ideal for general heating and cooling ducts. Maximum Operating Temperature: 212°F (100°C)●Application: General HVAC Duct or Air Conditioning Duct●Diameter: 9.8 inches (250 mm) x 13.4 feet (4Description Duct related parts for air conditioning