Manufactured with 24ga 316 Stainless Steel:

NOTE:Our stainless steel Increaser/Reducers have a three piece, tapered design for maximum flow to your unit. It comes with 2 female ends, so you can crimp the end you need. The Female End (the end you leave non-crimped)should always accept the liner, so the gases, creosote, etc … flow down through the increaser/reducer and not on the outside of your increaser/reducer. REMEMBER: If you are using these with our Rigid Lining System, no coupler is necessary, however if you are using this with our TOP-Flex liner, you will need to order a standard Coupler to transition from the TOP-Flex Liner to the Increaser/Reducer.
(EX. L625-R6 BEST-Flex LINER to a 6"-5" increaser reducer. The 6" liner slips into the larger end of the 6" Coupler. The bottom of the 6" Coupler will slip down into the top of the 6" end of the increaser/reducer.)