This Aluminum Wall Thimble with 3 Inner Diameter from the Round Gas Vent series is a Type B gas component and consists of the duralock system for a tight seal. Use for through-the-wall system to provide clearances for vent from combustibles.Adjusts from 3½ to 6 to accommodate various wall thicknesses Larger diameter wall thimbles are field fabricated Double wall construction UL ListedADA Compliant: No Collection: Round Gas Vent Depth: 3-1 2 - 6 Fuel Type: Natural Gas, Liquid Propane Inner Diameter: 3 Material: Aluminum Pipe Class: Type B Pipe Shape: Round Style: Contemporary Modern Weight: 7 Width: 7-1 2
