The AllPoints Foodservice Parts & Supplies 1721085 Control Knob & Dial is designed for precise dark/light adjustment. With a 1" outer diameter and a 11/16" depth, this knob features a 1/4" inner diameter and includes a set screw for secure attachment. Made from durable black plastic, it offers a reliable and functional solution for your equipment needs. Ideal for enhancing control and usability in various foodservice applications.