Dampers 18 x 20 Size (in)
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![EWC Controls 18X20 ND Rectangular Damper | 18X20 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_e644de2d-d2fe-47fe-91f0-208bc059415b_medium.png?v=1710946377)
18X20 ND | Rectangular Damper | 18X20 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 18X20 ND
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![EWC Controls 18X20 ND-RSD NC Rectangular Damper | 18X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_dedcea40-f6ed-463d-baea-b75e43a15109_medium.png?v=1713902409)
18X20 ND-RSD NC | Rectangular Damper | 18X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 18X20 ND-RSD NC
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![EWC Controls 18X20 ND-RSD NO Rectangular Damper | 18X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_70943a17-fc1f-4c9a-8b8b-370ea0da8092_medium.png?v=1713902384)
18X20 ND-RSD NO | Rectangular Damper | 18X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 18X20 ND-RSD NO
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