For the 42/52 cup version. 1 x upper bearing.
FSA Orbit C-40-ACB 1.5 Headset (No.42/ACB) IS42 / IS52 Tapered Integrate Headset
FSA Orbit ITA 1 1/8" - 1.5" Tapered Headset w/Top Cap #XTE1664
FSA Orbit 1.5E ZS Tapered Headset - No. 57E - ZS44/28.6 Upper - ZS56/40 Lower
FSA Orbit ITA 1-1/8" - 1.5" Tapered Headset with Top Cap, NO.9M/CUP/CC/12B/44-A, XTE1665
FSA Orbit ITA 1 1/8" - 1.5" Tapered Headset w/ Top Cap
