Save now and get the 20" x 12" Steel Blade Grille with 45° Fixed Blades Parallel to Short Dimension with an opposed blade damper in soft white (Shoemaker 936-0-20X12) at PlumbersStock.com. The 936-O series offers fixed 45-degree steel blades that are spaced at 2/3-inches. The blades run parallel to the shortest dimension. Be aware that the opposed blade damper requires a screwdriver to operate it. Countersunk mounting holes provide a flush appearance. Shoemaker is a trusted name for good reason. They have earned their reputation with quality manufacturing.