Product Details: Prepare your semi or trailer to be Ready for the Road Ahead™, with the Truck-Lite 4.35" 42-LED Round Side Turn Marker Light that provides bright and clear signal lights. With a vivid beam that be used to indicate brakes, tail signals, or emergencies, this replacement piece is the ideal part to make certain that vehicles adhere to local or federal standards. Fashioned with a high-efficiency bulb to work for extended periods of time. FleetPride is your First Click in Heavy Duty®.