General purpose fully porous C4 (USP L26) column, often used for peptide separations. Less retentive than a C8 or C18 phase. Pore size: 100A, surface area: 300 m2/g, 9% carbon load, endcapped. pH range 2.5-8.0, maximum temperature 80C. Guard cartridge REST-910250212 and Trident Level 2 (guard only, REST-27472) or Level 3 (guard + filter REST-27474) holder are highly recommended.