P15D-30 LED Headlight. 6 Volt non polarity. Works either positive ground or negative ground. Dual filament both low beam and high beam. Forward firing so all your light illuminates in front of you. Made with 1860 LED chip to illuminate your road. Available in White 6500K or Warm White 3000K. The diameter is approximately 1.06". The length is approximately 2.51".