Product Description Specifications: Color: White Material: Plastic Packing list: 2/4pcs white timer switch knob Features 1.Crafted for durability and ease of use, the 146MT574 Timer Knob Replacement ensures seamless compatibility with your existing timer switch. 2.Each knob fits snugly and securely, providing precise control over your timer settings. 3.Whether you're looking to replace worn-out knobs or simply want a fresh look, these high-quality replacements are perfect for your bathroom fan, motor, heater,or light. 4.With this reliable solution, you can effortlessly manage your appliances,enhancing both convenience and energy efficiency in your home. Quality Material: Made from durable fireproof plastic materials, our Timer Knob Replacement is engineered to be much stronger than the original knobs, providing a reliable solution for your bathroom fan, heater, motor, or light without the need for complete timer replacement Perfect Compatibility: 146MT574 Timer Knob Replacement is specifically designed for use with timer switches, ensuring seamless compatibility with various models including the FD series spring wound timers such as FD5MW, FD15MWC, FD30MWC, and more Easy Installation: Enjoy hassle-free setup with our press-on knob design that allows for easy installation in just one minute. Simply align the D-shaped hole on the back of the knob with the shaft, and you’re ready to go Specifications : Each timer switch knob features an outer diameter of 1.02 inch and a D-shaped shaft measuring 0.19 inch, making it an ideal fit for your timer switches Package Includes: With our Timer Knob Replacement, you receive a total of 2 high-quality knobs,ensuring that you have on hand for future needs