The DirectVent Pro wall thimble provides a complete wall-pass-through and fire stop. Use with Square Horizontal Cap only. May be required in Canada. Refer to the appliance manufacturerÂ’s installation instructions for requirements.ADA Compliant: No Depth: 4 Finish: Galvanized Fuel Type: Gas, Liquid Propane Height: 11 Material: Aluminum, Galvanized Steel Pipe Class: Direct Vent Pipe Inside Diameter: 5 x 8 Pipe Shape: Round Style: Contemporary Modern UL Listed: Yes Vent Construction: Double Wall Weight: 15 Width: 11