The DirectVent Pro 4 x 6-5 8 Inner Diameter Galvanized 90 Degree Elbow is a component that is used in a typical venting installation. The 90 degree elbow for the DirectVent Pro series is used to offset obstructions as needed. It is fully unitized with twist-lock construction. The elbows swivel, allowing the lock to remain fully engaged while aligning to the desired direction. The angle will always remain fixed at 90 degrees.Elbow by Angle: 90 (degree) Finish: Galvanized Fuel Type: Gas, Liquid Propane Material: Aluminum, Galvanized Steel Pipe Class: Direct Vent Pipe Inside Diameter: 4 x 6-5 8 Pipe Shape: Round Style: Contemporary Modern UL Listed: Yes Weight: 12