Preferably, {TAIL ~ the film} has {HEAD ~ a total thickness} of from about 3 to 20 mils 
Preferably , { TAIL ~ the film } has { HEAD ~ a total thickness } of from about 3 to 20 mils
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH