uxcell 683ZZ Ball Bearing 3mm x 7mm x 3mm Double Shielded Deep Groove Bearings, Carbon Steel 20pcs

Great little bearings. All of them seem to be the right dimensions and spin freely. Would recommend

Very fragile bearings, they do not run smooth and can feel them grabbing when they turn. most were off-centered (see attached picture) and some had a lip in the bore, preventing a 3mm shaft from going through. These are good if you want to piss someone off and see their project fail.

snaps right into place