This Aluminum Tall Cone Flat Flashing with 10 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 to weather proof the penetration of vent pipe through the roof.Storm Collar required Select roof flashing based on pitch of roof Use on flat roofs, chase enclosures, or masonry chimney Double wall construction UL ListedADA Compliant: No Collection: Round Gas Vent Fuel Type: Natural Gas, Liquid Propane Height: 11-1 4 Inner Diameter: 10 Length: 25-1 2 Material: Aluminum Pipe Class: Type B Pipe Shape: Round Style: Contemporary Modern Weight: 17