Check the listing for details. 2 cables 200um & 600um Optical Fiber Cable That Fit SMA-905 SMA905 Spectrometer. Condition: Used. Listed at 89.99 USD. Up for sale are two optical fiber cables. One cable has a core diameter of 200um and the other is 600um. Both have standard SMA-905 connectors so they will fit all Ocean Optics products as well as other brand spectrometers with SMA-905 connectors. Besides having great range from 180nm to well over 1100nm, they are the perfect length when you need to have everything close together. Also, because the cables have a different diameter, it is a good way to see the effects of different diameter cables for under $100. Thank you. I have been an eBay member since 2001 with excellent positive feedback. I am very familiar with these cables so if you have any questions please scroll up and click "contact seller". Thank you.