Bullet points
- The Listed size 20"x 6" is for inside duct opening measurement, actual outside dimension is 21.75" X 7.75"
- Stamped Face Steel Construction with 1/2" fin spacing for high air flow
- Three Way Air Flow deflection Design
- Multi-shutter damper with easy handle to adjust desired amount of air flow
- Individually shrink wrapped with card board pad in the back for extra protection