Knob, [ 2-3/8" Dia ] [ Off-Hi-8-2-Lo] [Mount .187"] [ Flat Up ], Wells Food Warmer/Heat & Hold/Hot Dog Steamer/Roll Warmer/ Rw-1, Rw-16, Rw-16Hd, Rw-176Hd, Rw-1Hd, Rw-2, Rw-26, Rw-26Hd, Rw-2Hd, Rw-3, Rw-36, Rw-36Hd, Rw-3Hd, Rw-4, Rwn-1, Rwn-16, Rwn-2, Rwn-26, Rwn-3, Rwn-36, SS-10T, SS-10Td, SS-10Ult, SS-10Ultd, SS-206T, SS-206Td, SS-206Ult, SS-206Ultd, SS-276Ult, SS-276Ultd, SS-4Ult, SS-4Ultd, SS-8T, SS-8Td, SS-8Ult, SS-8Ultd, Wv-2Hg, Wv-2Hsg, Wv-4Hf, Wv-4Hs, Wvf-886, Wvg-136