Overview Image Disposable Columns Image Econo-Pac Columns Image Bio-Spin Columns Selection Guide Image Column and Resin Selection Guide These empty and prepacked columns provide convenience for sample preparation and other small-scale applications. Category Products Image Empty Gravity Flow Columns Empty Econo-Pac and Poly-Prep gravity-flow columns and accessories are ideal for sample and buffer preparation, as well as for gravity flow chromatography applications. Image Empty Spin Columns Empty Bio-Spin and Micro Bio-Spin chromatography columns are disposable polypropylene spin columns that can be packed with a variety of chromatographic media. Image Bio-Spin® and Micro Bio-Spin™ Size Exclusion Spin Columns Bio-Spin and Micro Bio-Spin size exclusion columns are ideal for quick, easy, and inexpensive cleanup of DNA or protein samples. Image PCR Kleen™ Spin Columns PCR Kleen columns are prepacked spin columns for purifying PCR products and other DNA molecules of >200 bp directly from reaction mixtures. Image Prepacked Gravity Flow Columns for Ion Exchange Poly-Prep prepacked columns for gravity-flow chromatography provide convenience for sample preparation and other small-scale applications. The graduated 0.8 x 4 cm columns are made of polypropylene. Image Econo-Pac® Protein A Prepacked Gravity Flow Columns Econo-Pac prepacked columns for gravity-flow chromatography allow fast and simplified antibody purification. Image Econo-Pac® 10DG Desalting Prepacked Gravity Flow Columns Econo-Pac prepacked columns for gravity-flow chromatography allow fast and easy desalting.