Replaced my aluminium stack with these carbon ones, much better than having 1 of the correct size than multiple spacers. Carbon was clean & tidy

Awesome headset carbon spacer set, exceptional range of sizes, excellent quality and great value for money… would highly recommend - I bought two!!!

Only product which I bought which didn't meet my expectations.
Sure these are cheap coming from manufacturer selling high-grade parts but I don't see the difference berween these and cheap 2$ chinese knockoffs from aliexpress
Small size 2mm spacers were a bit twisted and inside finish were quite imperfect with bubbles and gaps
It still fits but would like to expect better qc