ORIGINAL: b_in_atl
Edit:I guess the guy was just keeping the strings in anExcaliburFFF box. Upon further investigation I believe these strings are Excel and not FFF. How would I tell the difference for sure?
If it is a factory Xcel (not Excel) then it will be a brown with maybe some green strands in an endless loop string. If it is a factory string it will be either Dacron or Dyna Flight. Dyna Flight Flemish strings are much thinner than Dacron. Dacron strands are much thicker as well having 30 strands and the Dyna Flight has about 26 strands.