Hypercarb HPLC Column 10x8mm. GuardColumn, Reversed Phase, Carbon Load: 100%, Max. Pressure: 4300 psi (300 bar), Particle Size: 7 um, pH: 0 to 14, Pore Size: 250A, Surface Area: 120m2/g, Temperature: 105deg C, USP Type: L109, Stationary Phase: Porous Graphitic Carbon, Dimension: 10x8mm