On bikes with integrated headsets (such as the Ritchey Road Logic and Swiss Cross), the Comp Integrated IS headset stands out above the rest. The comp is equipped with high quality bearings with semi-cartridge. Material: steel Stack Height: 6.8mm (1 ⅛") / 6.7mm, 16.6mm (1 1.5" tapered) Stack Top Height: 6mm (1 ⅛") / 5.15mm, 15.3mm (1 1.5" tapered) Stack Bottom Height: 0.8mm (1 ⅛") / 1.55mm, 1.3mm (1 1.5" tapered) Head tube ID Upper: 42mm Head tube ID Lower: 42, 52mm S.H.I.S. upper: IS42/28,6 (1 ⅛") S.H.I.S. bottom: IS42/30 (1 ⅛"), IS52/40 (1.5") Weight: 75g (1 ⅛") Color: black