These are from Ford Motorcraft and an OEM service part. Each kit includes all the o-rings on each injector. The injector o-ring kits are for the following applications: 1995-2003 Ford E-Series vans and Ford F-Series trucks with the 7.3 DI (direct injection) Power Stroke Turbo Diesel engine. This listing is for a set of eight (8) o-ring kits. Shipping is via FedEx Ground Home Delivery based on your zip code and will show the amount in checkout. USPS AirMail is available for customers outside of the continental US. Email me for shipping charges.