This Kit, 2102 is an economical way to purchase 5 Cogent HPLC Columns that are often used with LCMS. Each Column has a 2.1mm Internal Diameter and is 100mm Long, packed with 2.2um particles, 120A pore size and are manufactured with Cogent TYPE-C™ Silica Hydride. This kit includes Cogent Diamond Hydride™, Cogent Bidentate C18™, Cogent Bidentate C8™, Cogent Silica-C™, Cogent UDC-Cholesterol™.