This headset uses press-in cups.
Outer diameter of the top cup is 44mm, of the lower cup 56mm.
It comes with two crown race seats (for the top of the fork) so will fit either tapered 1-1/8" to 1-1/2" forks or straight 1-1/8" forks. (Inner diameters of the two crowns is 39.8mm and 30mm.
Headset Weight (with 1-1/2" crown): 109g.