Dear Sir/Madam, Size:1-2 2-3mm Type:Expanded Perlite Application:Agriculture SiO2 Content (%):68-74% Fe2O3 Content (%):0.1~2% Al2O3 Content (%):12-16% MgO Content (%):0.3% CaO Content (%):0.15-1.5% K2O Content (%):1-4% Na2O Content (%):4-5% Loss On Ignition:4-8% Expanded Or Not:Expanded Usage:Heat Resistance Show More