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Powder coat finish
Square collar designed for a 20” × 20”
855 Series Engineering/Performance Data
Note: Listed Size Is Nominal Duct Opening / Nominal Filter Size
904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 20" Duct Opening (front blades parallel to shortest dimension)
Aluminum Airfoil Blade Double Deflection Diffuser 903-36X14 Finish:Designer Color - Cement Gray Powder coat finishStandard Features Double deflection surface mount grille with adjustable airfoil blades Front blades parallel to longest dimension, back blades parallel to the shortest 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 metal rattle Countersunk mounting holes with color matching Phillips Pozidriv screws Rust resistant pre coat with durable powder
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