Solid-state light-emitting diode never needs replacementBright chrome-plated body, bezel, washer and hexnutBezel protects LED from damage and reflects more lightMounting hole: 0.546" dia.Quick connect 0.25" terminals are polarized for easy wiringBody length: 1.248", max. bezel dia. 0.63" Fits into panels 0.02" - 0.3" thick