The Bull BBQ (16501) replacement main burner large knob bezel is constructed of durable 304-grade stainless steel and fits all Bull BBQ gas grills (any size). To install, simply detach main burner control knob by pulling directly out, unscrew old bezel with Phillips screwdriver and replace with new. Installation takes less than 1 minute. Sold individually. 24-Inch Bull Grills require three(3) grill knobs, the 30-Inch Bull Grills require four(4) and the 38-inch Bull Grills requires five(5) grill knobs.