The spool housing holds a spool of dental floss and dispenses an exposed portion of {TAIL ~ floss} through an output port above {HEAD ~ the base} 
The spool housing holds a spool of dental floss and dispenses an exposed portion of { TAIL ~ floss } through an output port above { HEAD ~ the base }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD