Review on Uxcell SMR105C 2OS 5X10X4Mm Stainless Bearings by Carlos Chan

Accuracy is very good. Unfortunately the bore/bore is not 5mm as advertised - it is 4.65mm so cannot be used for a 5mm shaft. I can't use this camp. Also, this is ONLY ONE BEARING, don't make the mistake of looking at 10 packs of bearings and then clicking on this similar product listing thinking you're buying 10 packs because of the same price as me. Yes, a stainless steel ABEC 7 bearing costs the same as 10 chrome steel ABEC 3 bearings (7 is much more accurate than 3). If you want a stainless steel ABEC-7 bearing with a 4.65mm bore diameter, you would need this, but would never know the true diameter to make a purchasing decision. Given the superior accuracy, you'd think they could be more accurate in terms of specs as well.