The AllPoints Foodservice Parts & Supplies 221420 Control Knob & Dial is designed for precise temperature control in foodservice equipment. This thermostat knob features a 2-1/4" outer diameter and a width of 2-5/8", ensuring compatibility with various appliances. The .187" diameter stem allows for easy installation, while the included bolt secures it firmly in place. Made from durable black plastic, this knob is built to withstand the rigors of a busy kitchen, providing reliable performance and a sleek appearance.