Raven R1511 PVC Termination Vent with 304 Stainless Steel Screen, 6 Inch, Slotted Side for Condensation to Drain, Durable, Easy to Install in Hub of PVC Fitting, Maximum Airflow Patented - unique slot on the side of vent cap allows water condensation to drain Simple - no efforts required, vent easy to install inside hub of PVC fitting adapter (not included) Tough - stainless steel won't corrode or rust, Type 304 mesh screen prevents leaves, debris and wildlife from entering vent pipe Airflow - no obstruction to vent allows maximum airflow All vent types - furnace, water heater, air, intake, exhaust, and roof vents and water drains Fittings - Please note that hub fitting adapter is not included and must be purchased separately - check for compatible sizing