This is an NTN 6204Z unshielded bearing. I received an SKF 6204 JEM OPEN bearing. I am very concerned as I spent almost $3 to get a basic item that would arrive on time to fix broken hardware. Now I have to change the order and put the production on hold for another 2 days. And (!) I have to make a UPS delivery, which is better than driving 40 minutes to the nearest UPS branch. Revane, this time you failed.