The device 1 further comprising a pair of end caps adapted for sealing {HEAD ~ opposing ends} of {TAIL ~ said device} 
of
The device 1 further comprising a pair of end caps adapted for sealing { HEAD ~ opposing ends } of { TAIL ~ said device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL