Hypersil BDS HPLC Column 20x250mm. Preparative column, Standard, Reversed Phase, Carbon Load: 7%, Max. Pressure: 4300 psi (300 bar), Particle Size: 10 um, pH: 2 to 8, Pore Size: 145A, Surface Area: 185m2/g, Temperature: 60deg C, USP Type: L7, Stationary Phase: C8, Dimension: 20x250mm