GL Sciences offers a wide range of HPLC and LC-MS columns, including the Inertsil and InertSustain series known for their high purity, low back pressure, and wide pH compatibility, and the MonoCap series that uses monolithic silica for ultra-fast separations. They also provide bio-inert columns for proteomics, and their products cover various separation modes like reversed-phase, HILIC, and size exclusion. GL Sciences columns are designed for reproducibility and performance in applications from analytical to preparative scale, with options for different particle sizes, IDs, and lengths.