Hypersil HPLC Column 8 mm. Hypersil HPLC Column, preparative HS C18, Carbon Load: 15%, Column Format: Guard, Reversed Phase, Particle Size: 10 um, Pore Size: 100A, Max. Pressure: 4300 psi (300 bar), pH: 2 to 9, Surface Area: 350 m2/g, USP Type: L1, Stationary Phase: C18, Dimensions: 10X8mm