8" X 28" RECTANGULAR DAMPER, APPLICATION: AIR QUALITY, VOLT: 24, FEATURES: ADJUSTABLE RANGE STOPS, MOTOR: SPRING RETURN, MOTOR SIDE: 28", WIRES TO MOTOR: 2, KEVLAR GEARING REDUCES WEAR, MORE THAN DOUBLING DAMPER LIFE, MECHANICAL VISUAL POSITION INDICATOR FOR DAMPER STATUS, SOLID CONSTRUCTION USING EXTRUDED ALUMINUM FRAME AND BLADES, PARALLEL BLADE DESIGN FOR LOW LEAKAGE PERFORMANCE, QUIETER OPERATION WITH FEWER BLADES, WEIGHT: 10 LBS, 5 OZ; MADE IN MEXICO