This is the Ideal 205990 Rear Flue Outlet Kit (55/80) - Flue Terminal - 80mm, designed for use with Ideal storage tank water heaters. This kit allows for the safe and secure attachment of the flue terminal to the rear of the water heater, ensuring proper ventilation and exhaust gases are safely expelled from the home. This product is made with high-quality materials and is built to last, providing a reliable and durable solution for your water heating needs. With its easy installation and compatibility with Ideal water heaters, this flue terminal kit is a must-have for anyone in need of a reliable and efficient water heating system.