The AllPoints Foodservice Parts & Supplies 1731139 Control Knob & Dial is designed for precision and ease of use. This valve knob fits a 0.25" diameter D stem and features a flat design that securely rests in the 'off' position. Made from durable black plastic, it ensures longevity and reliable performance in various foodservice applications. Ideal for replacing worn or damaged knobs, this component enhances the functionality of your equipment.