990H or 990V and AL990H or AL990V — Double Deflection Supply, Steel or Aluminum
- Model 990H or V and AL990H or V provide maximum four-way diffusion.
- Front and rear blades are set on 3/4" centers with adjustment of each easily accomplished through face.
- Steel or Aluminum
- Bright White finish standard
- Countersunk mounting holes.
H means horizontal blades; V means vertical blades