I'm giving this one asterisk as none of the ones in the photos Size shown is correct. I needed a 19mm thin wall for a new wheelset, this bushing doesn't fit the wheel. The description says it's .98" but it's actually 1.125". I have no idea if it is are good or durable but I can confirm they are not the diameter they are talking about.For reference 17 is 1.025" and 21 is 1.180".