Aluminum Airfoil Blade Grille - Horizontal Fixed Blade 907-8X42 Damper:without Damper 1/2" spacing dual angular louvers

1/2" spacing dual angular louvers for strength and maximum free area

Locking screw to hold damper in place

Hand operated lever for easy filter access

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 24" Duct Opening (front blades parallel to shortest dimension)

Aluminum Airfoil Blade Grille - Horizontal Fixed Blade 907-8X42 Damper:without Damper 1/2" spacing dual angular louversStandard Features * Extruded . 055 T6 aluminum 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 * 907 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