Aluminum Door Grille 4100-20X10 Finish:Designer Color - Velvet Black Flush core and frame provides

Flush core and frame provides smooth surface

Adjustable aluminum airfoil blades oriented for 1 or 2 way airflow pattern

Standard Features * 4000 - door core grille with single frame * 4100 - door core grille with additional loose frame *

Adjustable aluminum curved blades

Standard Features * T-Bar lay-in panel with perforated face * 2x2 galvaneal steel panel with seismic support hangers * Round No Labor Collar attached to panel * Soft White Options * 105 P D - multi-shutter damper with hinged perforated face * 105 P O - opposed blade damper with hinged perforated face * TVB - Thermal Vapor Blanket * Square collar

Aluminum Door Grille 4100-20X10 Finish:Designer Color - Velvet Black Flush core and frame providesStandard 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 *