... ,4-8mmRaw vermiculite:Golden:0.3-1mm,1-2mm,1.5-2.5mm,1-3mm,2-4mm,3-8mm,4-8mmSilver:0.3-1mm,1-2mm,2-4mm,4 ... .Quality Control: As samples confirmed by buyer, Or manufacture by certificate of quality, Or by CIQ (or SGS) inspection . 6.Price and other ...