{TAIL ~ Each side} may also have {HEAD ~ a height} between about 5 μm and about 15 μm 
{ TAIL ~ Each side } may also have { HEAD ~ a height } between about 5 μm and about 15 μm
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH