The DirectVent Pro 4 x 6-5 8 Inner Diameter Galvanized 45 Degree Elbow is a component that is used in a typical venting installation. The 45 degree elbow is used to offset obstructions as needed. The elbow is fully unitized, and comes with twist-lock construction. The elbow swivels, allowing the lock to remain fully engaged while aligning to the desired direction. The angle will always remain fixed at 45 degrees.Elbow by Angle: 45 (degree) Finish: Galvanized Fuel Type: Gas, Liquid Propane Height: 8-1 2 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 Vent Construction: Double Wall Weight: 9