Steel Blade Double Deflection Diffuser 933-24X20 Damper:Opposed Damper Standard Features * Steel galvaneal

Standard Features * Steel galvaneal construction * For evaporative coolers or central blower systems * Modern step-down design * 4-way air diffusion * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * One-piece removable slide damper for off season closure * Soft White

round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 4" Duct Opening  (front blades parallel to shortest dimension)

Designed for large volume air delivery

Steel Blade Double Deflection Diffuser 933-24X20 Damper:Opposed Damper Standard Features * Steel galvanealStandard Features * Surface mount diffuser * Nylon bushings for easy adjustment and quiet setting of steel blades * Countersunk mounting holes for flush appearance with color matching Phillips posi drive screws * Double deflection diffuser * Front blades parallel to longest dimension * Back blades parallel to shortest dimension * All blades adjustable allowing 4 way flow adjustment * Soft White Options * 933 O with recessed screwdriver operated