Lamp holder. Relampable front panel indicators accept a variety of T-2 and T-3 ¼ miniature bayonet lamps. 11/16" chassis hole Total Length = 1.755" (solder lugs included in measurement) (extends about 1.68" from front of panel to end of solder lugs) Rating: 125V, 75W Threading: 9/16 - 24Available JewelsAmber L117Blue L120Clear L122Green L116Purple L121Red L115Violet L121VWhite L123