The Garland 151729 Valve Knob provides precise manual temperature adjustment to ensure optimal cooking control across your commercial range. Measuring 2-1/8 inches in diameter, this heavy-duty component functions by securing directly onto the equipment\'s gas valve stem, translating a user\'s rotational force into incremental adjustments of the internal valve mechanism to regulate fuel flow. The ergonomic, heat-resistant grip allows kitchen staff to make quick, safe adjustments during peak operating hours without risking burns.