Steel Blade Grille - Horizontal Fixed Blade 938-12X10 Step Down Ceiling Diffuser 2" ADC compliant round collar

2" ADC compliant round collar with bead for ease of installation (square sizes only)

Locking screw to hold damper in place

w/ Screwdriver Operated Opposed Blade Damper

904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 6" Duct Opening   (front blades parallel to shortest dimension)

Standard Features * Lightweight Aluminum vent louver * Able to withstand wet and corrosive environments * Spring clip mounting * Easily installed using only a high grade silicon caulk * Satin Anodized finish Options * IS - Insect screen * Standard Color or Designer Color Finish available on this product

Steel Blade Grille - Horizontal Fixed Blade 938-12X10 Step Down Ceiling Diffuser 2" ADC compliant round collarStandard Features *Surface mount return air grille * 0 fixed blades parallel to shortest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi drive screws * Soft White Options * 938 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