National Chimney M-Flex 4" x 15" Stainless Steel Standard Liner Kit h22.63 Masonry Inner Liner

Masonry Inner Liner

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

Grill Ultimate Bundle

Antique Chestnut

Selkirk 6" to 14" Inner Diameter

National Chimney M-Flex 4" x 15" Stainless Steel Standard Liner Kit h22.63 Masonry Inner LinerM 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