The AllPoints Foodservice Parts & Supplies 221497 Control Knob & Dial is designed for open burners, featuring a durable black plastic construction. With a diameter of 2-1/2 inches and a depth of 1-15/16 inches, this knob is easy to grip and operate. The .350-inch diameter stem ensures a secure fit for reliable performance in your kitchen equipment. Ideal for replacing worn or damaged knobs, it enhances the functionality and appearance of your cooking appliances.