The Exhaust Flue O-Ring from Noritz America Corp is a vital component for ensuring a secure seal in your heating system. Designed to fit exhaust flues with a diameter of 49.6 mm, this O-ring prevents gas leaks and enhances safety during operation. Made from durable materials that can withstand high temperatures, it is essential for maintaining the efficiency of your heating system. Its precise dimensions ensure a perfect fit, making installation quick and easy. This O-ring is suitable for both residential and commercial applications, contributing to the overall reliability of your heating setup.