National Chimney M-Flex 4" x 15" Stainless Steel Standard Liner Kit h22.63 U/Hour rating maximum 593

U/Hour rating maximum 593

and all necessary fittings to convert your unit from propane gas to natural gas

Large Six-Sided Pier Mount with Stud (RM5) Offers a classic

Antique Chestnut

Mixture Of Rocks

National Chimney M-Flex 4" x 15" Stainless Steel Standard Liner Kit h22.63 U/Hour rating maximum 593M 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