VarioPrep (VP) columns for preparative HPLC. Available lengths [mm]: 50, 75, 100, 125, 150, 250, 500. Available ID [mm]: 8, 10, 16, 21, 32, 40, 50, 80 mm. Can be packed with all NUCLEODUR and NUCLEOSIL spherical silicas (particle size >3 µm). Column system for preparative HPLC manufactured from stainless steel with two adjustable end fittings, e.g., for frequent use of backflushing techniques.