This stainless steel exhaust is designed for gas water heaters, featuring a chimney elbow and extension . It ensures efficient ventilation and safe exhaust of gases. The durable construction for performance, making it ideal for both residential and commercial use. Its sleek design seamlessly integrates with various heating systems. Features -Color:Silver -Material:Stainless steel -Size: 13.50X8.00X8.00cm/5.31X3.14X3.14in craftsmanship: crafted to ensure durability and reliability, providing performance for your gas water heater exhaust system -Extended design: the chimney elbow extension design effectively increases the exhaust distance, enhancing the efficiency of flue gas discharge from the water heater -Builtin check valve: features an integrated check valve to prevent backflow of flue gases, ensuring the indoor air quality remains safe and clean -Flexible corrugated structure: made with a corrugated structure that offers excellent flexibility and seismic resistance, suitable for various installation environments -Easy installation: simple to install with included tools and instructions, allowing users to set up the system effortlessly on their own Package list: 3 heater exhaust pipe