7" DuraVent DuraBlack Stove Pipe Adaptor 7DBK-AD 7" DuraBlack Stove Pipe Adaptor is used to adapt DuraBlack stove pipe to appliance flue outlet. Diameter: 7" Length: 4" Painted Black Finish Lock Seamed Drip-Free No Cutting or Crimping Needed Use for a single-wall connector pipe Requires 18†clearance to combustibles