This product is a 2 pack of Sylvania H11 SilverStar Ultra High Performance Halogen Headlight Bulbs. The bulbs have a wattage of 55 W and a voltage of 12 V. They are suitable for use in headlights and use halogen lighting technology. The package includes 2 bulbs and they are designed to fit H11 bulb fitment code. The manufacturer part number is H11SU.BP.