Whirlpool Replacement Surface Burner Knob For Ranges is compatible with Jenn-Air. This infinite switch knob is an inch and a half in Diameter. It is made of plastic and has an orange indicator line as well as orange lettering denoting the 'off' position. There isalso white numbering used to indicate the temperature level of the surface burner. Replace part numbers Y703899, 7-3899, 7-4447, 703899, 704447, PS11757573, Y704447, B003N5M74Q, B017KJ9M3O, B008DJS1MO.