1.Size:20-325mesh0-8mm 2.Color:white and gray 3.technique :expanded 4.H.S code:6806200000 5.Specific gravity:0.15-2.4g ... /cm3 Expanded perlite 1 ... , 120mesh, 150mesh, 0.1-1mm, 0.5-1.5mm1-2mm, 2-4mm3-6mm 4-8mm Horticultural Perlite: 1-2mm, 2-4mm, 1-4mm ,3-5mm.4-8mmSpecial ...