{HEAD ~ Film} 23 preferably has {TAIL ~ a thickness} of about 1/128 inches , although an acceptable range is approximately 0.5 1.0 mils 
{ HEAD ~ Film } 23 preferably has { TAIL ~ a thickness } of about 1/128 inches , although an acceptable range is approximately 0.5 1.0 mils
HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH