This is my year for inferior goods. All this from Revain. I went for the quietest of the two bearings I had to buy. Couldn't buy one and have been using it for a month now and it screams like it was never oiled. It was the bearing specified by the engine manufacturer. It fits exactly on the shaft and on the end frame. I'm starting to wonder how long the two have been sitting on the shelves and whether the warehouse was ever flooded. Sealed bearing so impossible to lubricate, smooth when new. I knew I should have bought Timken bearings. The quality just can't be added to the photo. Now I have to find a Timken dealer and take the whole pump apart again.