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![EWC Controls 4 URD 4 Inch Round Motorized Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/urd-sm_07e7adb7-d68b-443d-b241-d537040f9794_medium.gif?v=1720094307)
4 URD | 4 Inch Round Motorized Damper | EWC Controls
Brand: EWC Controls
SKU: 4 URD
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![iO HVAC Controls TD-20 Trane 20" Round Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-TDXX_3962c5b1-d098-4edf-b66e-7c10da947a09_medium.jpg?v=1719992523)
TD-20 | Trane 20" Round Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: TD-20
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![iO HVAC Controls MD-18 MD Series 18" Round 3 Wire Damper PO/PC | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/iO-MDXX_5e8f68ab-3a59-43f9-ab55-e0967ffe4197_medium.jpg?v=1708912733)
MD-18 | MD Series 18" Round 3 Wire Damper PO / PC | iO HVAC Controls
Brand: iO HVAC Controls
SKU: MD-18
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![Braeburn 129020 Round Damper | 20" Round Motorized Damper Spring Return - Normally Closed | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/PO_SR-Round_88a21558-d075-4f45-80ec-8e662648cf02_medium.jpg?v=1720005015)
129020 | Round Damper | 20" Round Motorized Damper Spring Return - Normally Closed | Braeburn
Brand: Braeburn
SKU: 129020
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