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Return& Item Quality control:
1 year warranty  

Fit with Following:

2012-2019 SuperSix EVO
2014-2019 Synapse Carbon (Except 2018~2019 Size: 44,48,56,58&61CM)
SystemSix
CAAD10~ CAAD13
CaadX
-Slice

Some Cannondale take 1 1/8"  or 1 1/2" or 1 3/8" Lower Bearing and this won't fit 

Detailed information of the product:

Lower headset bearing * 1pc
Upper Headset bearing * 1pc

Bearing Size : 30.15x41.8x6.5 - 34.1x46.9x7

Just like Cannondale KP203 headset

2 Types of Bearing Option:

Steel：

Race Material: P6 bearing steel
Ball Material: P6 bearing steel
Enclosure: Two Seals
Enclosure Material: Rubber Seal

Ceramics:

Race Material: P6 bearing steel
Ball Material: Nitrided Silicon Ceramic SI3N4
Enclosure: Two Seals
Enclosure Material: Rubber Seal

Fit with the headset of Cannondale SystemSix, CaadX, SuperSix Evo,Synapse Carbon (Size: 51-54), CAAD10~CAAD13,Slice & Giant Over Drive model: TCR