For gas-fueled appliance venting
UL Listed 441 (470°)
Double-wall; air insulated
Alumiunum inner; galvanized steel outer
Snap-Lock™ Design
Made in the U.S.A.| Part # | Description | Ctn Qty | List Price/Each |
|---|---|---|---|
| 18x20 | DW Increaser, 18" to 20" | 1 | -- |
| 18x22 | DW Increaser, 18" to 22" | 1 | -- |
| 18x24 | DW Increaser, 18" to 24" | 1 | -- |
| 18x32 | DW Increaser, 18" to 32" | 1 | -- |
