The disks are also lighter in weight than {TAIL ~ lead solder balls} of {HEAD ~ equal diameter} 
The disks are also lighter in weight than { TAIL ~ lead solder balls } of { HEAD ~ equal diameter }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD