The DuraPlus 8 Galvanized Class A Triple Wall Chimney Pipe Tee with Cap is used for through-the-wall chimney installations. The tee cleanout cap is removable for easy chimney cleaning or inspection. Wall Straps, a Wall Thimble, and a Tee Support must be installed with the Tee as directed. Tees have 1 insulating blanket. Ventilation air for chimney must be drawn from outdoors.ADA Compliant: No Collection: DuraPlus Fuel Type: Coal, Gas, Oil, Wood Height: 16 Length: 8 Material: Galvanized Steel Pipe Class: Class A Pipe Inside Diameter: 8 Pipe Shape: Round Style: Functional UL Listed: Yes Vent Construction: Triple Wall Weight: 14