The AllPoints Foodservice Parts & Supplies 221172 Control Knob & Dial is designed for reliable on/off functionality. With a diameter of 2-1/2 inches and a depth of 1 inch, this knob features a .350-inch diameter stem for easy installation. Made from durable black plastic, it offers a sleek appearance while ensuring long-lasting performance in various foodservice applications. Ideal for replacing worn or damaged knobs, it enhances the usability of your equipment.