Aluminum Door Grille 4000-20X4 Step Down Ceiling Diffuser 1/2" spacing dual angular louvers

1/2" spacing dual angular louvers

Zinc plated steel closure spring

Blades parallel to shortest dimension

916 Series Engineering/Performance Data

All steel galvaneal construction

Aluminum Door Grille 4000-20X4 Step Down Ceiling Diffuser 1/2" spacing dual angular louversStandard 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 *