FSA Premium Orbit 1.5-ZS Lower ZS56/40 36x45

FSA's flagship headsets in separate upper and lower headset cup assemblies- FSA Integrated 41.2mm ID (36x45), Campy Hiddenset 42.0mm ID (45x45) , ZS (ZeroStack), or EC (traditional External Cup) available for 1-1/8" and tapered steerers- For clarification go to http://www.fsaeasyheadset.comZS56/39.78 (36x45)