The DirectVent Pro 4 x 6-5 8 Inner Diameter Galvanized Horizontal Windguard is a component that is used in a typical venting installation. Use with through-the-wall termination cap where high winds are present. Also use as a safety heat shield to prevent children or others from coming into contact with the vent termination cap. Fits both 4 x 6-5 8 and 5 x 8 terminations.ADA Compliant: No Depth: 12 Finish: Galvanized Fuel Type: Gas, Liquid Propane Height: 13-1 2 Material: Aluminum, Galvanized Steel Material: Galvanized Steel Pipe Class: Direct Vent Pipe Inside Diameter: 4 x 6-5 8, 5 x 8 Pipe Shape: Round Style: Contemporary Modern UL Listed: Yes Weight: 3 Width: 23