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Chimney, Pipes & Liners > Lining Systems > Duraflex Aluminum Liner > Aluminum DuraFlex - 4" Products - Aluminum DuraFlex - 4" 4" X 15' Aluminum Liner Kit By Duravent Other Sizes: -- Choose a size -- 3" X 15' Aluminum Liner Kit 4" X 15' Aluminum Liner Kit 5" X 15' Aluminum Liner Kit 8" X 15' Aluminum Liner Kit 3" X 25' Aluminum Liner Kit 4" X 25' Aluminum Liner Kit 5" X 25' Aluminum Liner Kit 5.5" X 25' Aluminum Liner Kit 6" X 25' Aluminum Liner Kit 7" X 25' Aluminum Liner Kit 3" X 35' Aluminum Liner Kit 4" X 35' Aluminum Liner Kit 5" X 35' Aluminum Liner Kit 5.5" X 35' Aluminum Liner Kit 6" X 35' Aluminum Liner Kit 7" X 35' Aluminum Liner Kit 8" X 35' Aluminum Liner Kit 4" X 25' Aluminum Extension By Duravent Price - Dealers Only 4" Coupling By Duravent Other Sizes: -- Choose a size -- 3" Coupling 4" Coupling 5" Coupling 5.5" Coupling 6" Coupling 7" Coupling 8" Coupling 4" DuraFlex Puller By Duravent Other Sizes: -- Choose a size -- 3" DuraFlex Puller 4" DuraFlex Puller 5" DuraFlex Puller 5.5" DuraFlex Puller 6" DuraFlex Puller 7" DuraFlex Puller 8" DuraFlex Puller 4" Flex Adapter By Duravent Other Sizes: -- Choose a size -- 3" Flex Adapter 4" Flex Adapter 5" Flex Adapter 5.5" Flex Adapter 6" Flex Adapter 7" Flex Adapter 8" Flex Adapter