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Construction: 6063 Extruded aluminum frame mechanically interlocked with hairline mitered corner for strength. A double set of 6063 extruded aluminum blades on 3/4" (19.05) centers provide air control in both vertical and horizontal planes. Blades are individually adjustable with zero metal-to-metal contact with the use of nylon bushings to eliminate noise, corrosion and vibration. Extruded flexible vinyl gasket is standard and produces a perfect positive air seal.
Optional screwdriver operated opposed blade damper with nylon bushings.
Standard fastening is countersunk screw holes.
ME (square contour) a standard frame style.
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