MetalBest Double Wall Gas Vent is listed to UL 441 and ULC S-605 and features an aluminum inner liner and galvalume outer casing. Natural and Propane Gas applications. 3", 4", 5", 6", 7" & 8" inner diameters. Product line includes SWC Single Wall / DWC Double Wall Connectors and Model OV Oval Gas Vent.
