Fsa orbit x headset threadless headset in a classic shape with modern styling for high end road bikes features forged and cnc machined 6061t6 and aluminium cups patented alignment tip for increased durability and performance th brand 36 degree micro angular contact bearings 7075t6 crown race stack height 184 131 31 5mm fits 1 or 118 buy fsa components from chain reaction cycles the worlds largest online bike store