The beads 21 are preferably {HEAD ~ commercial stock plastic beads} of {TAIL ~ the type} commonly available for plastic injection molding of commercial plastic parts 
of
The beads 21 are preferably { HEAD ~ commercial stock plastic beads } of { TAIL ~ the type } commonly available for plastic injection molding of commercial plastic parts
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH