As an industrial and scientific professional, I rely heavily on bearings for my work .According to my experience, these bearings provided by Bonbo are excellent in terms of both performance and durability. They have a smooth motion and can handle even heavy loads with ease. Additionally, they have proven to be long-lasting under intense use. HOWEVER the price is slightly higher compared to some other bearings in the market. Overall, I highly recommend these bearings for anyone in need of high-quality bearings for their power transmission products..