The AllPoints Foodservice Parts & Supplies 221395 Control Knob & Dial is designed for precise temperature control in foodservice equipment. Measuring 2-1/2 inches in length and 1-1/4 inches in diameter, this thermostat knob features a durable black plastic construction. The 1/4-inch diameter stem ensures easy installation and compatibility with various appliances, making it an essential component for maintaining optimal cooking conditions.