Flashing 1 12 - 7 12 and Storm Collar for 7 Diameter PipingFor Free Standing Direct Vent Gas Stove 1 12 - 7 12 Flashing Needed with vertical installations Seals the vent lengths protruding from a sloped roof Storm Collar included For use with 7 Diameter Piping Proudly Made In USADiameter: 7