Z-Flex 3" x 20' Aluminum Liner Kit sqft431 We feel that great strength

We feel that great strength (and life) is directly proportional to the amount of steel along the bar's diagonal

sides: 11"W x 31"H

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Masonry Fireplaces Industries

Z-Flex 3" x 20' Aluminum Liner Kit sqft431 We feel that great strengthUL 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.