Hi there, Thank you so much for the service, Delivery in 15 days, thats very fast, well done. I am 100 % satisfied with the 3x7x3 ball bearing , This product is good quality. Thanks. I recomend this seller for the quick service and quality.
These bearings are not very round internally and have not been put together very well. These could be useful under a lot of applications, if not most, but I imagine in tight tollerence engineering use cases, these would be looked down upon.