Stamped polished brass, lacquer coated to prevent tarnish. With the low current consumption of .068 amps at 12 volts they give off very little heat and have extremely long service life. Vibration resistant, these LED dome lights feature 18 white LEDs per light. Surface mounts with three RH fasteners (not included). Prewired with integral side mounted on/off toggle switch. A 4" B 5-1/2" Fastener #4 RH