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Specifications (Mil Spec 3)
Soda Lime Glass No free silica
Size 20 / 30 mesh
Specific Gravity 2.45 to 2.50 g/cm3
Bulk Weight 1.5 kg/l
Hardness (Mohs) 5.5
Toxicity None
Color Clear / Colorless
Configuration Spherical
Contamination None
Roundness 65 to 95%

Chemical composition weight-%
SiO2 min. 65 %
Al2O3 0.5 - 2.0 %
Fe2O3 max. .15 %
MgO min. 2.5 %
CaO min. 8 %
Na2O min. 14.00 %
Other max. 2 %