4DFA-25K | Flexible Gas Kit | Aluminum | 4 in X 25 ft | Duravent570437794SKU:4DFA-25KInventory ID:03605013Select Item:Price: $335.50Quantity: 4 X 25' Aluminum Flex Liner Kit Kit includes: DuraFlex AL Length, DuraFlex AL Cap, DuraFlex Top Plate, and DuraFlex Mortar Sleeve. Reviews Choose your rating12345