The roller frame assembly includes at least one idler wheel and {HEAD ~ a number} of {TAIL ~ guide rollers} 
of
The roller frame assembly includes at least one idler wheel and { HEAD ~ a number } of { TAIL ~ guide rollers }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL