Steel Blade Grille - Fixed Blade 935-30X6 Residential Registers & Grilles Standard collar diameter is the

Standard collar diameter is the same as the diffuser size

Full-length screwdriver operated Scoop Extractor

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 18" Duct Opening (front blades parallel to shortest dimension)

Square to round 2" collar with roll formed retention bead

Standard Features Double deflection surface mount grille with adjustable airfoil blades Front blades parallel to longest dimension

Steel Blade Grille - Fixed Blade 935-30X6 Residential Registers & Grilles Standard collar diameter is theStandard Features *Surface mount return air grille * 45 fixed blades parallel to longest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi drive screws * Soft White Options * 935 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 version * Tamper proof screws