The BenchMark chromatography columns are optimized for aqueous systems and resistant to many solvents used in liquid chromatography. Use these economical columns for low pressure or gravity feed applications. Each column is supplied with two fixed endpieces pre-assembled with 2 µm SS frits plus all the tubing, fittings, and connections needed to get started. Endpieces with different size frits and material are available to meet your application.