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