Char-Broil Universal Control Knob for gas grills with D-shape valve stem design. Universal fit grill control replacement knob Replaces control knobs for primary and secondary burners on most gas grills with d-shape valve stem design Adjustable off position and for different grill models Easy installation Black color Universal fit grill control replacement knob Replaces control knobs for primary and secondary burners on most gas grills with d-shape valve stem design Adjustable off position and for different grill models Easy installation Black color Size: 2" Diameter