Knob,Control, Fits Brand Vulcan Hart, For Use With Mfr. Model Number ECO2D, ECO4D, ECO4S, ECO6D, GCO2D, GCO4D, GCO4S, GT-88, SG4C, SG4D, SG6C, SG6D, VC4EC, VC4ED, VC4ES, VC4GC, VC4GD, VC4GS, VC6EC, VC6ED, VC6ES, VC6GC, VC6GD, VC6GS, For Use With ECO2D, ECO4D, ECO4S, ECO6D, GCO2D, GCO4D, GCO4S, GT-88, SG4C, SG4D, SG6C, SG6D, VC4EC, VC4ED, VC4ES, VC4GC, VC4GD, VC4GS, VC6EC, VC6ED, VC6ES, VC6GC, VC6GD, VC6GS