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Countersunk mounting holes for flush appearance
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 30" Duct Opening (front blades parallel to shortest dimension)
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 20" Duct Opening (front blades parallel to shortest dimension)
back blades parallel to longest dimension
2" ADC compliant round collar with bead for ease of installation (square sizes only)
Aluminum Airfoil Blade Double Deflection Diffuser 904-32X18 Residential Registers & Grilles Countersunk mounting holes for flush904 Double Deflection Adjustable Aluminum Blade Grille For a 32" x 18" Duct Opening (front blades parallel to shortest dimension) Standard Features Double deflection surface mount grille with adjustable airfoil blades Front blades parallel to shortest dimension, back blades parallel to longest dimension Extruded aluminum surface mount frame with signature line marks Provides 4 way air flow on one plane Nylon bushings on adj. blades prevent metal on
