Metal-Fab 4" Double Wall Type B Gas Vent SKU 4MDC Please select 4" D.W. DRAFT HOOD CONNECTOR4" X 5' D.W. FLEX4" D.W. FLASHING 6/12 TO 12/124" X 7" D.W. INCREASER4" X 6" D.W. PIPE4" D.W. ADJ LENGTH FEM ADAPTER4" X 90 D. W. ELBOW 4M90 Log in to view price