The DirectVent Pro 4 x 6-5 8 Galvanized Round Horizontal Termination Cap Square Base (Aluminum) is a component that is used in a typical venting installation. The round horizontal termination cap is used for through-the-wall terminations.ADA Compliant: No Finish: Aluminum Fuel Type: Natural Gas, Liquid Propane Length: 11 Material: Galvanized Steel Pipe Class: Direct Vent Pipe Inside Diameter: 4 x 6-5 8 Pipe Shape: Round Style: Contemporary Modern UL Listed: Yes Weight: 4 Width: 11