Pore size specifically controlled for analyzing proteins with molecular weights of several hundred thousand Daltons; optimized for light scattering detection, high performance analysis of antibody drugs and various proteins, high lot-to-lot reproducibility, fulfills USP L20, L33, and L59 requirements, MW range = 5,000 to 100,000 Daltons, exclusion limit = 170,000 Daltons, dimensions 8.0 mm ID x 300 mm L