It should have been a sealed bearing but when it arrived half the seal was missing, the box was flat and there was already debris in the raceway. It was done through the Orlando Fulfillment Center, and before anyone asks, there was no other warehouse seal in the sealed envelope. I seriously overpaid for the correct manufacturer part and gotten junk. Now I have to use it anyway because I've run out of downtime for the tool. If I could give 0 stars I would.