[1-Pack] 6910-ZZ Radial/Deep Groove Ball Bearing 50mm x 72mm x 12mm Metal Shield
These ball and roller bearings carry the QJZ brand, and they seem well made for daily use.
[2-Pack] 6910-ZZ Radial/Deep Groove Ball Bearing 50mm x 72mm x 12mm Metal Shield
A nice touch is the QJZ brand marking up perfectly with the product listing.
[2-Pack] 6908-ZZ Radial/Deep Groove Ball Bearing 40mm x 62mm x 12mm Metal Shield
The QJZ brand is on the outer race, which is a nice touch and easy to spot.