Works with for All 6.0L 2003-2007 rails Function: Kit will help you fix the leaking injector rail without replacing the entire rail. Any worn injector O-ring will need to be replaced. Direct replacement for easier working can save your time and money. Material: The socket is made of 4140 impact grade hardened steel with high durability, impact resistance and wear resistance, anti-rust. Package Included: 1/2 inch drive nipple cup socket; 8PCS Heavy Duty O-Rings Color: Black Material: Metal Package Contents: 1x Drive Socket 8x O-Rings Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.