if it is the front one, you will also need the needle roller bearing that fits inside the stub axle that the drive shaft/cv joint runs in and they are very fine and a right bu££er to get out in one piece and undamaged
i got one from local stealers last july for about £40
but that was just the stub axle then you need
wheel bearings
tab washer
needle roller bearing
gasket
hope this helps a bit