2006 Mazda 3, Does the strut top mount have a bearing on them or is it...

[ViewSonic]

...another part. Can't remember.? Some of the small ball bearing fell out during an installation a while back and can't remember if they had fell out of the strut top mount or a bushing I believe it fits into. Need to replace part but want to buy the right part. Passenger side where it fell out makes a funny noise when i turn the wheels..A dung noise. Thanks