Unexpanded Perlite: 16-32mesh, 20-40mesh, 50-150mesh, 200-325mesh.
Expanded Perlite: 0.1-1mm, 1-3mm, 3-5mm
Horticultural Perlite: 1-2mm, 2-4mm, 1-4mm
Data for reference

Element: SiO2 Al2O3 NaO2 K2O Fe2O3 MgO CaO
Coefficient% 68-74 12-16 4-5 1-4 0.1-2 0.3 -1 0.15-1.5
Specific Gravity Expansion
0.5-2.4g/cm3 18times min
Applications:
Widely used as insulating layers in industrial smelting furnace and walls and floors of architectures.
Filing and dilating agent in rubber, painter and plastic, etc.
Catalyst in explosives.
Used to absorb floating oil.
Used in agriculture and gardening to improve the soil and withhold water and fertilizer.
Used to filter liquor, oil, medicine, food and dirty water.