National Chimney M-Flex 4" x 25" Stainless Steel Standard Liner Kit d37.4 Set the timer

Set the timer

This part can be found at all major hardware stores in your area

allows for effortless operation

these bowls are the perfect water feature that you can add to your yard or patio

National Chimney M-Flex 4" x 25" Stainless Steel Standard Liner Kit d37.4 Set the timerM 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