2 Red 4" LED Duo Clearance Identification Fender Side Marker with Reflex Truck Trailer Lights This is a 4" side marker light. Functions as a clearance or side marker light Its polycarbonate lens is snapped on the housing. Red lens and red lights. Contains 2-diode square LED lights on the sides plus 4-diode round LED lights in the center. Operates from 9~16 volts SAE approved and complies with the DOT requirements