National Chimney M-Flex 6" x 20" Stainless Steel Standard Liner Kit watt354 Wall straps are required every

Wall straps are required every 4’ on the exterior of the building only

7 gr/hr emissions

1875" (A) x 3" (B) x 5

Model 35CVS-HCR Series 3" x 5" Concentric Vent System

Part Number S503BLK Finish Black Material Steel Height 30-Inch Width 39-Inch Depth 8-Inch Weight  26 lbs Warranty

National Chimney M-Flex 6" x 20" Stainless Steel Standard Liner Kit watt354 Wall straps are required everyM 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