Silica gel, high-purity grade, pore size 60 Å, 200-400 mesh particle size. Expand. View Pricing. 60738. Silica gel, high-purity grade, pore size 60 Å, 220-440 mesh particle size, 35-75 μm particle size, for flash chromatography. Expand. View Pricing. 391484. Silica gel, high-purity grade (7734), pore size 60 Å, 70-230 mesh.Web