Hope headset, integral, 44mm top, 56mm lower. So for a tapered headtube (with internal headset) and tapered steerer. Hope would call it a 2E (CRC link)
Bought 9months ago, used a few times but not much over winter as the bike had brake issues. Has some scuffs from my bikepacking gear but bearings/seals are still perfect.
£30posted (no topcap or star-nut thing)