Blazer FL552/536 Thermal Flasher Includes One Thermal Flasher Features US FMVSS 108 SAE J945, J950B Ratings Offers a Heavy-Duty 3-Terminal Design and Provides 60-120 Flashes Per Minute Features a Design that Fits All Standard Round Sockets and offers 11 - 15-Volts on 2 - 3-Lamps for Turn Signal and 2 - 6-Lamps for Hazard Warning Blazer is a Recognized Leader in the Aftermarket Lighting Industry