Ritchey:

Genuine Ritchey Lower Headset External Cup EC with Titanium-coated sealed cartridge bearing. Fits bicycles with 44mm inner diameter headtubes that require external headset cups.

Material – lower cup and crown race: alloy
Stack height: 13mm (EC44/33) 14.3mm (EC44/40)
Headtube ID: 44mm
S.H.I.S.: EC44/33 (1 ) EC44/40 (1.5)
EC44/33 (1 ) bearing: 46.0/34.1/7mm 45/45 – sealed cartridge (ACB) titanium coated
EC44/40 (1.5) bearing: 51.9/40.0/8mm 45/45 – sealed cartridge (ACB) titanium coated
Weight: 61g (EC44/33) 69g (EC44/40)
Colour: black