{HEAD ~ Size deviation} can be less than about 10% rms, less than about 9% rms, less than about 8% rms, less than about 7% rms, less than about 6% rms, {TAIL ~ less than about 5% rms}, or ranges between any two of these values 
be
{ HEAD ~ Size deviation } can be less than about 10 % rms , less than about 9 % rms , less than about 8 % rms , less than about 7 % rms , less than about 6 % rms , { TAIL ~ less than about 5 % rms } , or ranges between any two of these values
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH