Columbus Compass IS tapered headset

This Columbus headset features integrated bearings that fit directly into the 1 1/8"-1.5" tapered head tube of any frame using Camapagnolo-style cartridge bearings and a carbon gap cap. Specifications • 1 1/8" to 1.5" tapered • head tube id: 42mm upper/52mm lower • 45º/45º angular-contact bearings (IS42-28.6/IS52-40) • top cap & star nut/compression plug not included • stack height: 17mm • weight: 83g