National Chimney M-Flex 6" x 15" Stainless Steel Standard Liner Kit w49.8 000 BTU Framing Width 24

000 BTU Framing Width 24 in (60

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Electronic ignition system with battery backup – saves energy and works in a power failure

Can an outside source influence the operation of my remote control unit

National Chimney M-Flex 6" x 15" Stainless Steel Standard Liner Kit w49.8 000 BTU Framing Width 24M FLEX standard liner kits are used for wood, oil, coal, and gas appliances. Each of our . 006" (CB) and . 005" (CBF) standard kits comes with installation instructions and a lifetime warranty. This lining kit has been installed in venting applications since 1992 and continues to be the most popular "all fuels" kit we offer. We stock 3" 8" inside diameter (ID) as well as 6" 8" outside diameter (OD) in our . 006" (CB). What's Included 1x Installation