Hypersil HPLC Column 250 mm. Hypersil HPLC Column, preparative HS C18, Standard, Normal Phase/HILIC, Particle Size: 5 um, Pore Size: 100A, Max. Pressure: 4300 psi (300 bar), pH: 2 to 7, Surface Area: 350m2/g, Temperature: 60deg C, USP Type: L3, Stationary Phase: Si, Dimensions: 250X10mm