Aluminum Airfoil Blade Grille - Horizontal Fixed Blade 907-36X38 Damper:without Damper Standard Features * Heavy duty

Standard Features * Heavy duty honeycomb construction * Blades run parallel to longest dimension given * Gym Grade - includes welded core and extra supports for heavy duty application * Mounting holes for sidewall and ceiling application * Recessed screwdriver operated opposed blade damper to control air volume for positive balance of system * Soft White Options * No mounting holes * Tamper Proof Screws * Standard Color

TVB - Thermal Vapor Blanket

Reinforced welded core and extra supports for heavy duty application

904 - Double Deflection Adjustable Aluminum Blade Grille For a 42" x 18" Duct Opening (front blades parallel to shortest dimension)

linkage and handle enclosed in valve to assure trouble-free operation

Aluminum Airfoil Blade Grille - Horizontal Fixed Blade 907-36X38 Damper:without Damper Standard Features * Heavy dutyStandard 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