The CliQ Tapered headset was designed for frames that use a 1-1/8" - 1.5" tapered integrated headtube. Kit includes two precision sealed bearings (one 1-1/8" / one 1.5"), three aluminum dust covers in 8mm, 12mm and 18mm sizes, one 1-1/8" lower bearing race to use with standard 1-1/8" forks, one 1.5" bearing race, and a CliQ star nut to keep everything tight. (3 oz w/ 12mm dust cover)