If anyone is interested in taking the lapping sheets down to .1 micron (which I'm now addicted to), try this: 3M(TM) Diamond Lapping Film 661X, 0.1 Micron Sheet, 5.5 in x 5.5 in, 25 per inner 250 per case, distributed by R.S. Hughes - Industrial Distributor - Tapes, Adhesives, Abrasives, Safety, and Electronic Products