size of the drum bearing for idesit wg1130t?

my washing machine on fast spin sounds like a cement mixer i have checked out the possibilities for this and have come to the conclusion that it is the bearing that has dried out and i cant seem to find a bearing size and was hoping someone can provide me a answer asap also before i order the bearing is there anny other possiblilities to check i have checked 1 to see if the belt is slack 2 if the back plate is damaged or loose 3 if the is anything stuck in the holes of the drum ie a bra bone and 3 when i turn it does it make a noise from bearing area. i will be grateful if i can have this question answered thanks