Aluminum Airfoil Blade Grille - Vertical Fixed Blade 908-24X4 Step Down Ceiling Diffuser round collar only) * 830

round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U

Available 6

3 or 4 way air patterns from face * One size fits 6" thru 16" (collar by others) * Soft White

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

All steel galvaneal construction

Aluminum Airfoil Blade Grille - Vertical Fixed Blade 908-24X4 Step Down Ceiling Diffuser round collar only) * 830Standard Features * Extruded . 055 T6 aluminum 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 * 908 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