... ,20-40mesh,10-40mesh,1-3mm,2-4mm,3-8 mm,4-8mmSilver:40-80mesh ... 2-4mm,3-8mm,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 ... ventilation,water preservation,poisonless,odorless, low hardnes 2,Chemical compositions:ItemSiO2MgOFe2O3Al2O3CaOK2OH2OPHContent %37-4211-233.5 ... E-0515, Vermiculite for garden/agriculture,2-4mm