Aluminum Door Grille 4000-14X4 Step Down Ceiling Diffuser Louvers designed with rolled rib

Louvers designed with rolled rib for maximum strength and rigidity

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 20" Duct Opening (front blades parallel to shortest dimension)

Center margins are mounted on the backside of the grille for a streamlined continuous look

Installation Ring only

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 10" Duct Opening (front blades parallel to shortest dimension)

Aluminum Door Grille 4000-14X4 Step Down Ceiling Diffuser Louvers designed with rolled ribStandard Features * 4000 door core grille with single frame * 4100 door core grille with additional loose frame * . 060 T6 extruded aluminum construction * Completely vision proof * High air capacities * Will accommodate door thickness ranging from 1 1 4" to 2 1 4" * Countersunk mounting holes for flush appearance with color matching Phillips posi drive screws * Driftwood Tan Options * 1310 Series stainless steel door grille * Tamper proof screws *