Manufacturer Part Number: 9001K92R|Switch Accessory Type|1-3/8 Inch Screw-On KnobFor Use With|Harmony 9001K/SK/KX 30 mm Pushbuttons; KR24 Operators; SKR24 OperatorsIncludes|Size|Pushbutton Type|Extended (Mushroom Head)Pushbutton Shape|RoundColor|RedOperator Illumination|NonIlluminatedMaterial|PolycarbonateLamp Type|PSC Code|UNSPSC Code|