Fiber type; Carbon fiber powder Color / Appearance; Black, finely milled carbon fiber powder Fiber diameter; 5.0–7.0 µm Average particle size; 45–55 µm (300 mesh) / 25–35 µm (500 mesh) Carbon content, min.; 95% Ash content, max.; 1.0% True density; 1.75–1.85 g/cm³ Bulk density; 0.25–0.45 g/cm³ Electrical conductivity; Conductive material Water solubility; Insoluble Tensile strength of original fiber; 3500–4500 GPa Elastic modulus of original fiber; 220–240 GPa Moisture content, max.; 0.5% Packaging; 10 kg / 20 kg Guaranteed shelf life; 12 months