These guys aren't all that neat. Likewise the width, although I had to return a sentence because the center hole was too round for the rolling surface. but once I got them size they worked great.
I was happy with the product and the transaction. It was accurately described and the price was reasonable. I use thumb wheels on aluminum which is a soft metal so I don't know about the durability of the wheels.
These knurls are nowhere near concentric, the concentricity of the center hole varies by over 30,000 inches on one pair and slightly less on the other. Still usable if you point and drill your own hole, but that's just unnecessary pain. Rather spend a little more money and buy quality parts.