DuraVent DuraFlex 316 3" x 35' Stainless Steel Length w7.7 Model 4MRO Application For use

Model 4MRO Application For use with category I natural gas-burning or propane-fired appliances such as gas boilers

With great attention to detail

this takes a long time and can cause a lot of new problems

S-1507 Width 56 in

DuraVent DuraFlex 316 3" x 35' Stainless Steel Length w7.7 Model 4MRO Application For useDuraFlex Pro DuraFlex Pro is the ultimate in flexible steel liners for strength and flexibility. It features 20% more stainless steel per foot compared to other liners on the market. Its extreme flexibility facilitates problem free installations where multiple offsets are needed. DuraFlex Pro is available in 3 through 12 diameters in lengths, kits and custom lengths. DuraFlex Pro is manufactured utilizing highly corrosion resistant 316 Stainless