Z-Flex 2SVSTTF03 Z-Vent Tee Termination 3 in 3" Vent Termination Tee Stainless Steel Venting Termination tee can be used as either an intake or an exhaust piece Has a bird screen to prevent animals from getting into your exhaust system Rated AL29-4C and is approved for Category I (vertical only), II, III & IV applications Contains a built-in, fail-safe gasket and locking band connection