Particle Size:2.6µm pH Range:2 to 8 Pore Size:150 Å Packing Material:Spherical, solid core ultrapure silica Diameter:2.1 to 4.6 mm (Varies with model) Length:50 to 250 mm (Varies with model) Particle Shape:Spherical Solid-core Surface Area:80m2< sup="" /> / g