National Chimney M-Flex 4" x 15" Stainless Steel Standard Liner Kit btu38225 Adjustable Vent Free Hood

Adjustable Vent Free Hood

) in a tapered design to fit most fireplaces

ULC – S636 Width 15" Length 300" Clearance from single-wall connectors to combustible material shall be in accordance with NPFA 211 as shown in the table below

20" x 12" Adjustable Length Pipe

This way we can guarantee that they are top quality can be used in a fire pit and have no left-over gas pockets that could burst

National Chimney M-Flex 4" x 15" Stainless Steel Standard Liner Kit btu38225 Adjustable Vent Free HoodM 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