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904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 4" Duct Opening (front blades parallel to shortest dimension)
Note: Listed Size Is Nominal Duct Opening / Nominal Filter Size
Nylon bushings on adjustable blades prevent metal on metal rattle
1x2 T-Bar (8" x 20" duct)
Standard Features Double deflection surface mount grille with adjustable airfoil blades Front blades parallel to longest dimension
Steel Blade Double Deflection Diffuser 933-20X12 Damper:Opposed Damper 904 - Double Deflection AdjustableStandard Features * Surface mount diffuser * Nylon bushings for easy adjustment and quiet setting of steel blades * Countersunk mounting holes for flush appearance with color matching Phillips posi drive screws * Double deflection diffuser * Front blades parallel to longest dimension * Back blades parallel to shortest dimension * All blades adjustable allowing 4 way flow adjustment * Soft White Options * 933 O with recessed screwdriver operated
