Pre-Insulated Forever Flex is manufactured from 430 stainless steel in the outer skin and 304L or 316L inner stainless steel liner.
It comes ready to install with Olympia Chimney Supply's non-carcinogenic Super Wrap Insulation Blanket already wrapped around the liner. It is convenient for the installer; saving both time and money.
The outside dimensions is 2" larger than the inside dimension.
Forever Flex 18" x 18" No Sag No Leak Top Plate Upgrade
Forever Flex 316L Hybrid Pre-Insulated Chimney Liner Kit
Forever Flex 316L Hybrid Pre-Insulated Chimney Liner Only