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Stages Carbon for FSA 386 EVO Power Meter 
Stages does not make a BBright crank arm, however the Stages Carbon for FSA 386 EVO crank arm will fit a BBright crankset depending on the year of the BBright crankset.
Stages Carbon for FSA 386 EVO Power Meter
On the inside of the non-drive side crank arm, look for the words “BB386 EVO” (located on the bottom bracket end) or “XX/86” (located on the pedal end). Please see image below:
