Mason-Lite B-Vent 10" x 18" Round Rigid Pipe Java 6” is for 2×6 walls

6” is for 2×6 walls only

7" Diameter Top Plate

Model 4PVL-FF Product Type Roof Flashing

4 cubic feet Recommended Log Length 20" Efficiency LHV: 77%

Mason-Lite B-Vent 10" x 18" Round Rigid Pipe Java 6” is for 2×6 wallsB 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 10BV18 Product Type Pipe Venting Type B Vent