/ Product catalogue / Accessories / Filter Boxes / For Rectangular Ducts / FBK (rectangular) / FBK 1000x500-4
| B | B1 | B2 | H | H1 | H2 | L |
|---|---|---|---|---|---|---|
| 39 3/8” | 40 1/8” | 41” | 19 3/4” | 22 1/2” | 21 1/4” | 31 1/2” |
