{TAIL ~ A heating or cooling element} is disposed within {HEAD ~ the housing} to heat or cool the cavity 
{ TAIL ~ A heating or cooling element } is disposed within { HEAD ~ the housing } to heat or cool the cavity
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH