Unitized, coaxial venting system designed for use with direct vent gas or propane stoves, heaters, and fireplaces.Adds 3 - 7 of Length to a Straight Length of DirectVent Pro Pipe Twist Lock ConnectionADA Compliant: No Finish: Galvanized Fuel Type: Gas, Liquid Propane Height: 8-1 2 Length: 8 Material: Aluminum, Galvanized Steel Pipe Class: Direct Vent Pipe Inside Diameter: 5 x 8 Pipe Shape: Round Style: Contemporary Modern UL Listed: Yes Vent Construction: Double Wall Weight: 4