... 4.H.S code:6806200000 5.Specific gravity:0.15-2.4g/cm3 Expanded perlite 1.Expanded ... 0.1-1mm, 0.5-1.5mm1-2mm, 2-4mm3-6mm 4-8mm Horticultural Perlite: 1-2mm, 2-4mm, 1-4mm ,3-5mm ... 90-120mesh70-90mesh 20-40mesh ,0.05-1mm,0.06-2.5mm,0.1-1mm1-3mm3-5mm,4-8mm >40 micron ... 350kgsm3(as per customer’s demands)Thermal conductivity0.0220-0.0540Appearance white color , Irregular formSoftening point890-1090 º ...