Silica-based column suitable for aqueous SEC (GFC) analysis of proteins and enzymes over a wide range of molecular weight. Fulfills USP-NF, L20, L33, and L59 requirements. Target molecular weight range: 10,000-700,000 Da. Shipping solvent is water, usable pH range 3.0 to 7.5. 1,000A pore size, exclusion limit 1,000,000 Da (estimated). Guard column KW-G 6B recommended, part number 220-91524-77 with coupler 220-91524-97.