Parallel Volume Damper Low Leak 3000PLL-52X26 Step Down Ceiling Diffuser One piece curved frame with

One piece curved frame with gasket fits flush to spiral pipe

904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 12" Duct Opening (front blades parallel to shortest dimension)

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 24" Duct Opening (front blades parallel to shortest dimension)

055 T6 aluminum surface mount return air grille * 0 fixed blades parallel to longest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White Options * 907 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 * Fractional

*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches

Parallel Volume Damper Low Leak 3000PLL-52X26 Step Down Ceiling Diffuser One piece curved frame withh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control