SPI-A Class mold finish standard High Quality, Optical Quality SPI Finish A-1 — Grade #3, 6000 Grit Diamond Buff SPI Finish A-2 — Grade #6, 3000 Grit Diamond Buff SPI Finish A-3 — Grade #15, 1200 Grit Diamond Buff By admin|2017-03-18T09:06:04+00:00October 6th, 2016|SPI Mold Finish Standard|Comments Off on SPI-A Class mold finish standard Share This Story, Choose Your Platform! FacebookTwitterLinkedInEmail About the Author: admin