1. Variety:raw and expanded 2. Color:golden and silver 3. Size:0.3-1mm 1-2mm 2-4mm 20-40mesh 40-60mesh 60-80mesh and any size can customize 4. Expansion ratio:8 min 5. Asbestos:none 6. Impurity content:10% max 7. Physical and chemical index: Density : 220-280kg/m3 Porosity: 1100-1200kg/m3 Hardness: 1-1.5 Melting point:1320-1370C Compressive ressitance:100-150Mpa Index of refraction: Ng=1.545-1.581 Moisture conten: 7% max Moisture absorbency: 2% Anticongelation: good Antibioticity: good Corrosion resistance: Alkali-resitant. 25kg per woven bag or 1ton per woven bag Any others aslo can customize as your need.