The AllPoints Foodservice Parts & Supplies 22-1263 Control Knob & Dial features a 2-1/4" diameter design, allowing for precise temperature adjustments from OFF to 200°F to 500°F. This durable dial is an ideal replacement for Vulcan Hart part number 417490-1, ensuring compatibility and reliable performance in your foodservice equipment. Its clear markings facilitate easy operation, making it a practical choice for efficient kitchen management.