I was interested in buying a set of these but was concerned with a couple of the reviews that mentioned the rubber smell and one that said a matching pair of dumbbells turned out to be unequal. Before buying a set, I decided to order just a pair of the 2kg dumbbells to see if it was worth buying the rest.
They arrived quickly and well packaged as usual with Amazon. Although they do smell of rubber, I suspect this would fade over time. Unfortunately, when I looked at them in detail, the quality of each was quite different, with the handle of one of them looking like it had been chewed by the machine that produceds the knurled effect on the handle.
Worse still, one was noticeably longer than the other and when I weighed them using digital kitchen scales, it was found to be 102g heavier than the other. It doesn't sound much but that's a 5% difference.
I am sending them back to Amazon and I'll not buy anymore York branded hex dumbbells.