Looks like a hydraulic hose guide intended to take a wedge-fit "keeper." Man, I hate those things! Anyway, hydro guides can often do double duty as a cable stop if you have a proper adapter like this one: http://aebike.com/product/jagwire-5m...r2792-qc30.htm



When using these, the outer cable housing would end at these stops, leaving just the inner wire inbetween.