Get a discount deal on the 20" x 12" Double Deflection Adjustable Steel Blade Grille, Front Blades Parallel to Long Dimension in soft white (Shoemaker 933-20X12) while it's still available here at PlumbersStock.com. The 933 series offers a double deflection surface mount grille with adjustable steel blades that provide 4-way airflow. The front blades run parallel to the longest dimension. The nylon bushings reduce noise from metal rattling. Countersunk mounting holes provide a flush appearance. There is no opposed blade damper, and if you want one, check out the 933-O series. Shoemaker is known for heating and cooling reliability and innovative solutions.