Product details:

Vintage Air 506101: Heater, Gen-II, 10.0 in. width, 10.25 in. Height, 6.0 in. Depth, 3-Speed, Each - These Vintage Air Gen II heaters provide superior performance from the servo-controlled air door. They feature an improved case design and an exclusive electronic servo-actuated heater/coolant control valve. The heaters use a new 3-knob control that regulates temperature, fan speed, and the heat/defrost balance mode. The Vintage Air Gen II heaters are designed for use as floor outlets or to be connected to dash louvers.