Z-Flex 3" x 50' Aluminum Liner Kit btu53000 3" diameter x 4

3" diameter x 4

Ignition: Match Lit

Dimensions: 21" diameter

UL 2112 Diameter 5" Size W 10

The rear outlet kit includes the rear-outlet register

Z-Flex 3" x 50' Aluminum Liner Kit btu53000 3" diameter x 4UL listed aluminum chimney liner kit for use with Category I natural draft gas fired heating equipment and gas fireplaces. Note: For Use with Natural Draft Appliances. Not intended for use with Category II, III, or IV gas burning appliances as defined by the National Fuel Gas Code, NFPA 54, or other appliances that result in condensation or corrosive acids on the liner of the chimney, or that create positive pressures in the chimney system.