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This operating method is particularly high-performing and respectful of the environment
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The maximum overlap for 2 ½” frames is 1 ½” on each side
DuraVent DuraFlex SW 3" x 25' Stainless Steel Basic Kit h18 This operating method is particularlyDuraFlex 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
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