Set of 4 0.216mm nozzles for 1996 to 2003 Volkswagen TDI. They are OEM replacement parts for the Euro TDI 5 cylinder engine. When installed on US/Canadian cars, it will allow for nice 15% more power with 5% better fuel efficiency. Older cars may need some tuning or a chip to make those completely smokeless. Include 4 copper seals required for installation.