The tubing reel is biased in a retracting direction and includes ratcheting and releasing {HEAD ~ means} for selectably paying out or retracting {TAIL ~ the tubing} 
for selectably retracting
The tubing reel is biased in a retracting direction and includes ratcheting and releasing { HEAD ~ means } for selectably paying out or retracting { TAIL ~ the tubing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL