... filter aid , Vitrified micro bubbles, Brilliant expansion perlite,perlite powder 1.Perlite Feature: poisonless,tasteless,staleless,nonconbustible,acid-resistant,alkali-resistant ... Specification:12-16mesh,14-20mesh,16-32mesh,20-40mesh30-50mesh,50-70mesh ,70-90mesh ,90-120mesh 150mesh,200-325mesh 0.3 ... -0.6mm 0.3-1mm 1-2.8mm 1-2.5mm 1-3mm 2-4mm 3-5mm etc3.Physical and ...