| Color | : | Black |
| Inside Diameter | : | 4 in |
| Length | : | 25 ft |
| R Value | : | 4.2 |
Quietflex 420 4" X 25' R-4.2 Black Flex Duct (Yellow Bag)
| Color | : | Black |
| Inside Diameter | : | 4 in |
| Length | : | 25 ft |
| R Value | : | 4.2 |
Quietflex 420 4" X 25' R-4.2 Black Flex Duct (Yellow Bag)
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