Waters GPC18-4 GuardPak C18 Precolumn Cartridges

The Waters GPC18-4 GuardPak C18 Guard/Precolumn Cartridges are a four-pack of guard cartridges for HPLC systems, designed to protect the analytical column by trapping particulates and contaminants before the separation step. They feature 10 µm silica-based media with a 125 Å pore size to provide particulate filtration and contaminant retention in reversed-phase chromatography, helping extend column life and preserve consistent chromatographic performance. Suited for Waters liquid chromatography equipment and commonly used in pharmaceutical, biotechnology, analytical chemistry, and laboratory research environments, these guard cartridges install as a guard column cartridge insert for sample cleanup prior to analytical separation.