This is for 1 pair of Purple bulbs part number 1003!!This is a direct replacement, no modifications are necessary!2 bulbs, 1 pair for this price These bulbs will work in any 1003 Applications like: Backup bulbsTurn Signal LightsParking LightsInterior LightsAnywhere you can put a 1003 bulb!!This bulb is similar to an 1156 with the same round metal base, and single filament inside, but features a smaller glass bulbThese bulbs carry a full 1 year, no questions asked warranty