Overhead support system for carwash component comprising wall brackets having wall plates and support trays which extend outwardly therefrom to receive a crossbeam in nesting relationship therewith. In the pair of electrodes, one electrode, connected to a connection line that connects a load and a power supply that supplies voltage to the load, performs discharge toward the other electrode in response to application, to one electrode, of an abnormal voltage greater than or equal to a pre-set voltage exceeding a steady-state voltage output by the power supply in a steady state. Using second harmonic generation in GaAsAlGaAs as an example, properties are investigated and quantified such as nonlinear coupling efficiency, bandwidth, tunability, and limitations due to dispersion. Each of the magnetically controllable pixels also includes magnetic particles located within the flexible ring. This photodiode layer includes microcrystalline germanium and defines at least an n-layer, and i-layer and a p-layer. An optical fiber bundle is connected to the first opening and disposed in the grip.