Steel Blade Grille - Vertical Fixed Blade 937-18X8 Step Down Ceiling Diffuser Holds up to a 4"

Holds up to a 4" filter (not included) with filter retention tabs (FG4)

904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 12" Duct Opening (front blades parallel to shortest dimension)

All component parts

UL listed and tested in accordance with UL Standard 555C

Steel Blade Grille - Vertical Fixed Blade 937-18X8 Step Down Ceiling Diffuser Holds up to a 4"Standard Features *Surface mount return air grille * 0 fixed blades parallel to longest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi drive screws * Soft White Options * 937 O recessed screwdriver operated opposed blade damper * No Labor Collar (square sizes only) * 900 T T Bar mount * 905 HD reinforced construction * 905 IS insect screen * 1335 1338 Series stainless steel version * Tamper proof screws