Partsam 4pcs 3/4" Side Marker Clearance Aux Stop Turn Tail light Backup LED Red White Partsam (2Red+2White) 3/4" Side Marker light Grommet Mount Single Led, Clearance Marker and Auxiliary Stop Tail Turn Light. Led Side Marker Light, Fender Marker Light, Clearance Light, Indicator lights, Aux stop turn tail brake light etc. Can be used as an aux lighting to your existing brake light, but not approved as a brake light. Outer Diameter: 26mm (1.02''); Inner Diameter: 16mm (0.63''); Wire Length: 200mm (7.87'') EASY TO INSTALL - 3 Wire Connections: Black is Negative, Red+Black - high brightness, White+Black - low brightness