DescriptionVertex Top End Gasket KitFits ModelsCRF 450 L (19-20); CRF 450 R (19-20); CRF 450 RL (21-22); CRF 450 RWE (19-20); CRF 450 RX (19-20); CRF 450 X (19-22); CRF 450 L (19-20); CRF 450 R (19-20); CRF 450 RL (21-24); CRF 450 RWE (19-20); CRF 450 RX (19-20); CRF 450 X (19-24)SpecsDiameter99 mm