Hypersil HPLC Column 50 mm. Hypersil HPLC Column, preperative ODS C18, Standard, Reversed Phase, Particle Size: 5 um, Pore Size: 130A, Max. Pressure: 4300 psi (300 bar), pH: 2 to 8, Surface Area: 195m2/g, Temperature: 60deg C, USP Type: L1, Stationary Phase: C18, Dimensions: 50X20mm