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