The Pentair 471701 Exhaust Grill Gasket is an essential component that ensures a solid and airtight seal for exhaust grills in HVAC systems. With an external diameter of 7.875" and an internal diameter of 5.5", this gasket is designed especially to suit exhaust grills, offering a tight seal that stops gas and air escapes. By eliminating any undesired air exchange and ensuring that the... https://www.usapoolshop.com/471701-pentair-exhaust-grill-gasket