Usually {TAIL ~ the lateral dimensions} of {HEAD ~ the fibers} range from 20 μm to 125 μm 
Usually { TAIL ~ the lateral dimensions } of { HEAD ~ the fibers } range from 20 μm to 125 μm
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH