Cervical traction unit
FIG. 1 is a front perspective view of a cervical traction unit, showing my new design; 
     FIG. 2 is a side elevational view thereof, the broken line showing of the head being for illustrative purposes only and forming no part of the claimed design; 
     FIG. 3 is a rear elevational view thereof; and, 
     FIG. 4 is a bottom plan view thereof.