Biobasic 18 HPLC Column 20x250mm. Preparative, Standard, Reversed Phase, Carbon Load: 9%, Max. Pressure: 4300 psi (300 bar), Particle Size: 5 um, pH: 2 to 9, Pore Size: 300A, Surface Area: 100m2/g, Temperature: 60deg C, USP Type: L1, Stationary Phase: C18, Dimension: 20x250mm