As a loyal customer of Industrial and Scientific products, I was able to observe the PGN Sealed Bearing 499502H in action, and all I can say is WOW! The smooth rolling, quiet operation is a game changer for machinery efficiency. THE sealed design is also a plus for reducing maintenance and replacement needs. The only con I could find is the relatively higher price compared to other options, but the quality justifies it. Overall, I highly recommend this bearing for industrial applications..