The 3157LL long life replacement bulb is a quality auxiliary replacement bulb that will last up to 2 times longer than regular bulbs for continuous use. The bulbs have a sustainable design for reduced environmental impact - no mercury or other hazardous substances used in the making of these bulbs. The nickel-plated brass base contacts for superior connection over time. Ideal for front and rear turn signal, side marker, daytime running, stop and tail, parking and back up light bulb replacement. Package includes 2 bulbs.