size:12-16mesh,14-20mesh,16-32mesh,20-40mesh MOQ:5 ton/tons Trade terms:FOB CFR CIF Payment term:T/T L/C 1.Specification:Perlite sand(unexpanded perlite):12-16mesh,14-20mesh,16-32mesh,20-40mesh30-50mesh,50-150mesh,200-325mesh2.Physical and Chemical Properties Physical PropertiesChemical CompositionsExteriorGrey peppetsSiO268-74Specific gravity2.2-2.4g/ccAl2O312-16Vickers hardness5.5-7Fe2O30.1- ...