The Vulcan Hart 499595-00001 Range Burner Knob is designed to provide smooth and accurate control of burner settings on compatible commercial ranges. Measuring 2-1/2" in diameter, this red control knob works by attaching securely to the valve stem, allowing operators to adjust the gas flow and flame intensity with ease. Its color helps with quick identification during daily operation,... https://partsfe.ca/499595-00001-vulcan-hart-burner-vulcan-red-knob