Manufacturer Name: Siemens Building Technology Product Number: GMA161.1U OEM Part Number: GMA161.1U Product Description: 0/10Vdcs/R24vactuator Weight:3.24lbs/1469.64g The Siemens GMA161.1U Damper Actuator is high performance equipment for accurate control in HVAC systems. This actuator has a torque runs on a 24V power source with a 0-10VDC control signal for precise modulation.... https://www.partshnc.com/gma1611u-siemens-building-technology-010vdcsr24vactuator