Manufacturer Part Number: 9001SK46|Switch Accessory Type|Ring NutFor Use With|Harmony 9001K/SK/KX 30 mm Pushbuttons; SK20 Potentiometers; SK21 Potentiometers; SK22 Potentiometers; SK23 Potentiometers; SKS Selector SwitchesIncludes|Size|Pushbutton Type|Pushbutton Shape|Color|Operator Illumination|Material|Aluminum; ZincLamp Type|PSC Code|UNSPSC Code|