iO HVAC Controls RM-0808 Rheem 08 X 08 Rectangular Zone Damper, 35 Second Belimo ActuatoriO HVAC Controls RM 0808 ACTUATORS ARE INSTALLED ON 2ND DIMENSION Rheem 08 x 08 Rectangular Zone Damper, 35 second Belimo actuator Height: 8 Width: 8 Total Size: 08 x 08 Actuator Placement on the dimension: 8 Additional Information Item NumberRM 0808 BrandiO HVAC Controls MotorizedYes ShapeRectangular Size (in)8 x 8 Spring ReturnNon Spring Return TypeRectangular Dampers