Othmro 20pcs 623ZZ Deep Groove Ball Bearing, 3mm x 10mm x 4mm Double Shielded 623 Bearings, High Carbon Steel Bearing

The delivery was fast and the product size was as stated. I bought them from Amazon because the local company was more expensive and longer lead time. The bearings fitted my toolzone bandsaw guide perfectly and is doing the job well.

Very easy to replace they push into silicon surround.My fan motor is quiet again after 1 winter use daily

Great little bearings for 3D printed models. They run true and smooth.

Great product

Muy útiles, los utilizo mi hijo para un proyecto.

They work fine..just as described.

Todo perfecto y envío rápido.

These are not very expensive, it's true. But it is not a reason to introduce false information in the description to make them look as a deal ! As you can see in the screen capture, the description says that the bearings are sealed. As you can see on the photo, you can see the play between the shield and the center ring : you can see many balls, and even the color of my finger ! Also, make a few turns with the center ring, and you will see that it turns freely, as if there were no grease; you also will notice a tiny play.