Z-Flex Aluminum Chimney Liner Kits come complete with everything you need to quickly and easily install a professional venting system. Z-Flex liner is manufactured by using a dead soft aluminum strip which is spirally wound and mechanically joined together forming an air-tight and leak-proof Triple-Lock seam. Z-Flex's specially designed deep corrugations provide for greater flexibility and ease of installation. The result is a clearly superior product offering incredible longevity.