The DirectVent Pro 5 x 8 Inner Diameter Galvanized Attic Insulation Shield is a component that is used in a typical venting installation. Required for installations that pass through an attic to prevent insulation and debris from accumulating near the vent. Provides 1 clearance to combustibles.ADA Compliant: No Depth: 6-3 4 Finish: Galvanized Fuel Type: Gas, Liquid Propane Height: 11 - 20 Material: Aluminum, Galvanized Steel Pipe Class: Direct Vent Pipe Inside Diameter: 5 x 8 Pipe Shape: Round Style: Contemporary Modern UL Listed: Yes Weight: 9 Width: 6-3 4