Hypersil HPLC Column Prep BDS C18 4.6x250mm. Hypersil HPLC Column, Preparative BDS C18, Standard, Reversed Phase, Particle Size: 3um, Pore Size: 145A, Max. Pressure: 5800psi 400 bar, Ph: 2-8, Surface Area: 185m2/g, Carbon Load: 11%, Dimension: 4.6x250mm, for from analytical to preparative LC scale