The insert, when rotated with respect to a marking device, provides a relatively easy means for varying {HEAD ~ the width} of {TAIL ~ a stripe} 
The insert , when rotated with respect to a marking device , provides a relatively easy means for varying { HEAD ~ the width } of { TAIL ~ a stripe }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL