Mason-Lite B-Vent 12" x 18" Round Rigid Pipe btu32700 Closing any Gaps around the

Closing any Gaps around the Tile

Designed for seamless compatibility

Cast iron shaker grates

Available in 4" and 5" diameters

Model CT171 Size 4" Diameter

Mason-Lite B-Vent 12" x 18" Round Rigid Pipe btu32700 Closing any Gaps around theB Vent is a GAS ONLY metal chimney with smaller diameters. For those fireplaces requiring complicated chimney runs, B Vent may be just the answer. What's Included Round Rigid Pipe Features Available in 12", 18", 36" and 48" lengths Easy to assemble and can be combined to obtain the required installation height. To calculate installed height, deduct 1 for each joint. Specifications Item Number Mason Lite 12BV18 Product Type Pipe Venting Type B Vent