900H or 900V and AL900H or AL900V — Single Deflection Supply with Multi-Louver Damper, Steel or Aluminum

• Provides adjustable blade settings for Supply or Return applications. Lever-operated, multi-louver damper provides exacting volume control.
• Front row of adjustable blades are set on 3/4" centers to provide any required deflection. 
• Rear damper blades for volume control on 1" spacings. When closed, damper blades interlock to prevent air leakage.
• Steel or Aluminum. Blades are individually adjustable and spring-stiffened at both ends. 
• Bright White finish standard. Countersunk mounting holes.

H means horizontal blades; V means vertical blades