... Horticultural Perlite: 1-2mm, 2-4mm, 1-4mm ,3-5mm.4-8mmSpecial size is supplied as per customers' demands Perlite filter ... -1mm,0.06-2.5mm,0.1-1mm1-3mm3-5mm,4-8mm >40 micron etcBrilliant expansion perlite :as customer's demands 2 ... properties CompositionAl2O3SiO2Fe2O3CaONa2OK2OMaOPercentage12-1668-740.1-20.15-1.54-51-40.34.Perlite features : Poisonless,tasteless,staleless,nonconbustible,acid-resistant, ...