Particle Size:3 µm pH Range:2 to 9 Pore Size:100 Å Mode of Separation:Reversed Phase Diameter:2.1 or 4.6 mm (Varies with model) Length:50 or 100 mm (Varies with model) Particle Shape:Sperical Surface Area:320 Column Type:Reversed-Phase Stationary Phase:Syncronis C18 Packing Material:Spherical, fully porous ultrapure silica End Capping:Yes