This is a sealed cartridge headset to fit frames with internal/semi integarated tapered headtubes. This is size ZS44/ZS56 for a 40mm race and 28.6mm upper steer tube system.
Size: 1-1/8" to 1.5" Taper
SHIS: ZS44/28.6|ZS56/40
Steerer OD: 28.6mm
Cup: 44mm/56mm
Race: 40mm
Bearing Angle: 45°/45°
Color: Black
