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1550 Series Engineering/Performance Data
Double deflection radius mount spiral pipe grille with adjustable blades
½ × ½ × ½ Aluminum lattice
904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 8" Duct Opening (front blades parallel to shortest dimension)
Adjustable Diffuser 945-24X4 Accessories 1550 Series Engineering/Performance DataStandard Features Adjustable blades oriented for 3 or 4 way air flow pattern One piece stamped steel frame on most common sizes, alternate frame is extruded aluminum with signature line marks. Designed for ceiling or sidewall applications Nylon bushings on adj. blades prevent metal on metal rattle Lever operated steel multi shutter damper Countersunk mounting holes for flush appearance with color matching Phillips Pozidriv screws Rust resistant pre
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