FCL designed to accommodate R-4 and R-6 ductboard.
R8-FCL designed to accommodate R-8 ductboard.
180ยบ hemmed circumference/no raw edges.
FCL flange dimension (.700") exceeds Florida building code requirement of .625" (FL Building Code #603.5.6).
FCL: One piece wide tab collar for R-4/R-6 ductboard
R8-FCL: One piece wide tab collar for R-8 ductboard.
FCZ: One piece wide tab collar with scoop.
FCD: One piece wide tab collar with damper.
FCZD: One piece wide tab collar with scoop and damper.
FCLG: One piece wide tab collar with gasket.
FCLN: Nested one piece wide tab collar.
CG: Gasket only.
FCD-SOE: FCD with Miami Tech's 2" stand-off.
FCZD-SOE: FCZD with Miami Tech's 2" stand-off.

| Size | FCL | FCZ | FCD | FCZD | FCLN | CG |
|---|---|---|---|---|---|---|
| 4" | 100 | 80 | 100 | 80 | 40 | 80 |
| 5" | 100 | 70 | 100 | 70 | 36 | 80 |
| 6" | 75 | 60 | 75 | 60 | 36 | 80 |
| 7" | 60 | 50 | 60 | 50 | 28 | 80 |
| 8" | 50 | 40 | 50 | 40 | 22 | 80 |
| 9" | 40 | 30 | 40 | 30 | 20 | 80 |
| 10" | 40 | 30 | 40 | 30 | 16 | 80 |
| 12" | 25 | 20 | 25 | 20 | 24 | 80 |
| 14" | 20 | 15 | 20 | 15 | 20 | 80 |
| 16" | 15 | 15 | 15 | 12 | 16 | 80 |
| 18" | 15 | 10 | 15 | 8 | 14 | 80 |
| 20" | 15 | 10 | 15 | 6 | 12 | 80 |
| Size | R8-FCL | R8-FCZ | R8-FCD | R8-FCZD |
|---|---|---|---|---|
| 4" | 100 | 80 | 100 | 80 |
| 5" | 100 | 70 | 100 | 70 |
| 6" | 75 | 60 | 75 | 60 |
| 7" | 60 | 50 | 60 | 50 |
| 8" | 50 | 40 | 50 | 40 |
| 9" | 40 | 30 | 40 | 30 |
| 10" | 40 | 30 | 40 | 30 |
| 12" | 25 | 20 | 25 | 20 |
| 14" | 20 | 15 | 20 | 15 |
| 16" | 15 | 15 | 15 | 12 |
| 18" | 15 | 10 | 15 | 8 |
| 20" | 15 | 10 | 15 | 6 |