This OEM NORS drive shaft bellow fits Fiat Regata Weekend Ritmo models. Made in Italy, the CV boot has a diameter of 78mm and a length of 76mm. The axle nut thread diameter is 22mm, and the item is a vintage part with no universal fitment. The black rubber drive shaft bellow is a genuine Fiat part, and is perfect for those looking for a replacement or for restoring their vehicle. This CV boot is designed for the right placement on the vehicle, and is not a performance part. Buy with confidence, and enjoy the convenience of Motors.