The TEC SPCK Knob Off-On-Sim 2\" DIA is a control knob used in compatible commercial cooking equipment. It allows operators to adjust equipment settings by rotating the knob between designated control positions. Featuring a 2-inch diameter, this knob is marked with Off, On, and Sim settings for equipment operation and control. The component mounts onto the control shaft and serves as the user interface for temperature or heat adjustment functions.