The Star Mfg 2R-Z4997 Range Gas Valve Knob provides convenient manual control for compatible commercial range equipment. Designed to fit the gas valve control shaft, this knob allows operators to adjust the burner gas setting during routine cooking operation. Its practical design supports straightforward control and easy identification of the valve position. Replacing a worn, cracked, or missing knob can restore proper control access, improve usability, and maintain reliable range operation. It is a practical replacement component for compatible Star Mfg ranges in commercial kitchens.