FSAs 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 inch and tapered steerers
 For clarification go to http://www.fsaeasyheadset.com
| model | 
Premium C-40 | 
| upper/lower | 
lower | 
| S.H.I.S. | 
IS52/40 | 
| stack | 
0.7mm | 
| color | 
black |