Dear Sir/Madam, Size:3-6mm Type:Expanded Perlite Application:Agriculture SiO2 Content (%):68-74% Fe2O3 Content (%):0.15%-1.5% Al2O3 Content (%):12-16% MgO Content (%):0.3% CaO Content (%):0.3-1.8% K2O Content (%):1-4% Na2O Content (%):4-5% Loss On Ignition:4-8% Expanded Or Not:Expanded Show More