Ultra-Zoneā¢ Motorized Zone Damper, Series: ND Series, 24 VAC, 50/60 Hz, 8 x 20 in Damper, Terminal Block, Rectangular, Bottom Mount, Aluminum, Domestic.
The ND damper is constructed using heavy duty 0.8 in extruded aluminumGlass filled nylon bearings for quiet, maintenance free operationOverlapping parallel blade design insures low leakageDesigned to operate at static pressures up to 1.5 in w.cAnti-Rotation Bolt is 1/2 in L and has a no 10-32 ThreadUse with BM and BMPlus control pane