I tried to use these 6003-2RS bearings in a pressure washer. The bearings probably deserve 5 stars but how am I supposed to know. Nowhere in the description does it say they won't work in a humid place. The photo I posted is after 2 sessions of using it in a pressure washer surface cleaner. I bought an ASIN B01BMB3X68 surface cleaner and immediately replaced the original bearing which differs from other reviews, I wish I hadn't because now I can't compare the usability between them. But with this XiKe bearing, it didn't spin freely the morning after my first pressure washer. I knew it would be a red flag. The bearing does NOT easily pop in and out of the surface cleaner to lubricate the OUTSIDE of both sides so I don't know what to do.