... 150mesh, 0.1-1mm, 1-2mm, 2-4mm Horticultural Perlite: 1-2mm, 2-4mm, 1-4mm. Expanded Perlite: 60mesh, 100mesh, 120mesh, 150mesh, 0.1-1mm, 1-2mm, 2 ... -4mm Horticultural Perlite: 1-2mm, 2-4mm, 1-4mm.Data for referenceElement: SiO2 Al2O3 ... PCT% 68-75 12-16 4-5 1-4 0.1-2 0.3 -1 0.15-1.5Specific Gravity: 0.5-2.4g/cm3 Expansion Coefficient : 20times ...