National Chimney M-Flex 6" x 15" Stainless Steel Standard Liner Kit w30.25 eliminating the need to refill

eliminating the need to refill the water reservoir

the heater will be too hot

Product Type Elbow Kit

Curved design keeps firewood safe and secured

National Chimney M-Flex 6" x 15" Stainless Steel Standard Liner Kit w30.25 eliminating the need to refillM 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