FSA SL-k light crankset

Hugo7777
Hugo7777 Posts: 49
edited February 2017 in Road buying advice
Hi all I have just bought a FSA Light Crankset (4 arm) off eBay in new condition. It says in all the reviews etc it has a 5th bolt under the arm but mine has only 4 with no hole for a 5th bolt. It is a BB30 and 110bcd anybody no if this is ok hoping I have not bought a knock off
Many thanks

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