EWC 2418 RSD Series Round Motorized Damper, 2 Wire, 6

Honeywell Motorized Hvac Damper Zd16x20tz, 16" X 20", 24V Ac, Spring

Dayton 36"H 48"W Drnbl Extrd Alu Combo Dmpr: Hat Channel, 35 1/2 in H, 47 1/2 in W, Aluminum Model: 45C682

EWC CONTROLS 12 URD Motorized Damper, 12 Inch Round, Motorized, Efficient Air Regulation

B&B RV Ceiling Cool Vent W/ Rotating Damper - 1/4" Flange - 4-3/4" Diameter - Polar BM64MR

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Io HVAC Controls MD-10 10" Round Motorized Zone Damper | Supplyhouse.Com

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BANSBACH EASYLIFT Fixed Rotary Damper, Both Directions, FRT-C2-201-G1

Canarm Motorized Damper: For 20 in Nominal Duct Dia, Single Panel, 20 in H, 20 in W, Single Flange, Rubber Model: SX3220X20

KMC Controls Pneumatic Damper Actuator: Rotary, 5 Psi To 10 Psi Spring Range, Round Shaft Mounting, 100 Rotation Model: MCP-36313000

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Io HVAC Controls SD-1206 12" X 6" Auxiliary Zone Damper, SD-1206 | Supplyhouse.Com

Io D-XX Series Round, 2 Position, 2-Wire, Motorized Zone Control Dampers | Skip The Warehouse