Silica Gel 40-63µm 60Å For Flash or Column Chromatography (230-400 mesh or 0.040-0.063 mm; size up to grade 90%) Specification: Array: Silica Family / Formats: SiliaFlash® (Irregular Silicas) Particle Size: 40-63 µm / 230-400 mesh Pore Size: 60 Å Storage Condition: Keep dry