Hypersil HPLC Column 50 mm. Hypersil HPLC Column, preparative BDS C18, Standard, Reversed Phase, Particle Size: 5 um, Pore Size: 145A, Max. Pressure: 4300 psi (300 bar), pH: 2 to 8, Surface Area: 185m2/g, Temperature: 60deg C, USP Type: L7, Stationary Phase: C8, Dimensions: 50X10mm