Amazon.com: B-Type Silica Gel 75-150μm (100-200 mesh), Silica Gel of Column Chromatography, Used in Industry, Laboratories, etc(1kg/35.3oz/2.2pound) : Industrial & Scientific
Chromatographic Silica Gel 60A, 40-63µm, Pharmaceutical Grade - Manufactured to pharmaceutical use standards including tighter particle size distribution and GMP quality control standards.
Silica gel high-purity grade, 60Å, particle size 230-400mesh, particle size 40-63um, for flash chromatography 112926-00-8