The AllPoints Foodservice Parts & Supplies 221151 Control Knob & Dial is designed for optimal functionality in gas valve applications. With a diameter of 2-1/2 inches, this knob fits a .35-inch diameter D-stem, ensuring a secure and precise fit. Made from heat-resistant plastic, it offers durability and reliability in high-temperature environments. The sleek black finish adds a professional touch, making it an ideal choice for commercial kitchen settings.