These heavy-duty automotive replacement bulbs are designed to replace standard 3357 brake lights turn signal and tail light bulbs as well as other automotive and truck lighting tasks. Powered by 12-volts for bright illumination. Pack includes 2 amber bulbs. Easy to install. Ensure a symmetric light beam from both bulbs on the road by always replacing them in pairs. Save yourself a trip to the auto parts store. Use as replacement bulbs for 3357 signal light bulbs 3357 tail light bulbs 3357 side marker bulbs and 3357 brake light bulbs in trucks and cars as well as campers and RVs.