TSKgel™ UltraSW Aggregate columns have a slightly larger pore size and smaller (3 μm) particle size than the industry-leading TSKgel™ G3000SWXL (5 μm) and SuperSW3000 (4 μm) columns. These 30 cm x 7.8 mm I.D. silica-based, stainless steel columns offer reduced lot-to-lot variation, long column life, reduction of unspecified adsorption, and superior recovery of aggregates.