This Anti Roll Bar Bush Kit from Febi Bilstein is a genuine OE matching quality spare part. It is designed for the front axle, fitting both sides. The inner diameter is 18 mm and it weighs 0.233 kg. The part number is 37659. It is compatible with various Audi, Seat, Skoda, and VW models including Audi S1 quattro (8X), Seat Cordoba (6L), Ibiza IV (6L), Ibiza V (6J), Toledo IV (KG), Skoda Fabia I (6Y), Fabia II (54), Fabia II (58), Rapid (NH), Roomster (5J), VW Crosspolo 4 (9N), Crosspolo 5 (6R), Polo 4 (9N), and Polo 5 (6R). OE numbers for comparison are Audi, Seat, Skoda, and VW 6Q0 411 314 R S4. This product is an original Febi Bilstein product, offering solutions "Made in Germany".