The Intermatic 146MT574 is a white knob. This model is specifically designed for FD series decorator spring wound autooff timers; it replaces the 145MT494A model. This knob replaces the Intermatic 146MT574A white switch knob for the FD series spring wound type in-wall mounted timers. Genuine Intermatic Replacement Size: 1" Outside Diameter REPLACES: Intermatic 146MT574, 146MT494A
