The Vulcan Hart 00-719257-00012 Control Knob provides convenient and reliable adjustment of compatible commercial cooking equipment controls. Designed as a black replacement knob with a set screw, it works by fitting onto the equipment control shaft and allowing operators to turn or adjust the connected function as needed. The set screw helps secure the knob in position during regular... https://partsfe.ca/black-knob2-12-d-off-on-for-vulcan-part-00-719257-00012