The AllPoints Foodservice Parts & Supplies 221599 Control Knob & Dial is designed for optimal functionality in foodservice equipment. This valve knob features a 2-1/2" outer diameter and a .40" diameter stem, ensuring a secure fit for various applications. Made from durable black plastic, it offers a sleek appearance and reliable performance. The flat design positions the knob in the 'off' position, providing clear visibility and ease of use. Ideal for replacing worn or damaged knobs, this component enhances the efficiency and safety of your equipment.