Acme Miami 95010 10 in. Motorized Damper - Silver 2-wire spring return dampers 24 Volts AC actuator: Dia: 10".Position: N/C. Power Open. Increased Torque. Quieter Operation. Country of Origin: USA. Dimensions: 13.25"Lx13.5"Wx12.5"H. Weight: 5.7 lbs.