Shim-pack Scepter columns consist of an organosilane hybrid particle for excellent stability and performance. The C18 phase is a general-purpose column suitable for a wide variety of applications and mobile phase conditions up to pH 12 and 100% aqueous. USP L1, pore size: 120A, pH range: 1-12, max pressure: 45 MPa/450 bar/6,500 psi, carbon load: 20%, fully endcapped. A guard column is recommended to prolong the analytical column lifetime. Similar to XBridge BEH C18, Gemini C18.