Get a low price on the 24" x 8" Steel Blade Grille with 45° Fixed Blades Parallel to Long Dimension with an opposed blade damper in soft white (Shoemaker 935-0-24X8) with the pros at PlumbersStock. The 935-O series offers steel blades are spaced at 2/3-inches and fixed at 45 degrees. Take note that the blades run parallel to the longest dimension. The opposed blade damper requires a screwdriver to operate it. Countersunk mounting holes provide a flush appearance. Shoemaker has made a name for itself by manufacturing reliable heating and cooling products.