[ Engineered for Stability]With an outer diameter of 1 inch and a D-shaped shaft of 3/16 inch, this timer knob is meticulously crafted to a stable, tight connection that prevents slippage or wobbling during use. It offers precise control over your timer settings for optimal performance. [Highly and Visibly Marked]Constructed from high-strength ABS+PC materials, this 4-pack timer switch knob set resists heat and impact effectively. It maintains its integrity over time without cracking or deforming. [Compatible with 146MT574 Timer Knob]Designed for seamless compatibility with 146MT574 and FD Series spring wound , this replacement knob ensures a and easy installation without the need for additional tools. Its robust construction prevents wear and tear, enhancing the of your timer. [Versatile Application Across Devices]Ideal for a wide range of applications, these knobs are perfect for timer lights, ceiling fan heaters, fireplace stove fans, whole house fans, attic fan , bathroom exhaust fans, and heater . They provide a reliable solution for managing various devices in your home or ., Weight: 0.0220462262 Pounds, Manufacturer: Ehwisbe