Shop now and save on the 18" x 6" Double Deflection Adjustable Steel Blade Grille, Front Blades Parallel to Short Dimension with an opposed blade damper in soft white (Shoemaker 934-0-18X6) here at PlumbersStock.com. The 934-O series offers a double deflection surface mount grille with adjustable steel blades that provide 4-way airflow. Take note that the front blades run parallel to the shortest dimension. The opposed blade damper requires a screwdriver to operate it. The nylon bushings reduce noise from metal rattling. Countersunk mounting holes provide a flush appearance. Shoemaker designs HVAC solutions that are both affordable and practical.