This is a genuine OE quality replacement cylinder head bolt washer from Febi Bilstein. Designed for VW and Audi vehicles, this washer ensures reliable performance and durability. It is engineered to meet stringent OE specifications. The product details include specifications such as Thickness [mm]: 4, Inner Diameter [mm]: 11.5, Outer Diameter [mm]: 20, Surface: Phosphatized, and Weight [kg]: 0.006. It is compatible with a wide range of VW models including Transporter IV Bus, GOLF I Cabriolet, GOLF II, Transporter IV Kastenwagen, GOLF I, Polo Coupe, Transporter IV Pritsche / Fahrgestell, Polo Schrägheck, SCIROCCO, Jetta II, Passat Variant, Polo Classic, PASSAT, SCIROCCO, Jetta Mk1, Derby, POLO, PASSAT, DERBY, PASSAT Variant, and Audi models such as 100 Limousine, 80, 100 Avant, COUPE, 200 Limousine, QUATTRO, 80, 200 Avant, 100, 200, 50, 100 Avant. It is also compatible with SEAT models including Ibiza II, Cordoba Limousine, Inca, TOLEDO I, and Cordoba Vario. The part numbers associated with this product are 056103377, 1J0253150A, 1J0253150B, 56103377, and 6K1253208AE.