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Size Exclusion EconoSpin Size Exlusion Columns for Dye Removal and Protein Desalting Constructed from virgin PP and 20 um PE frit, these versatile filteration units can be filled with a variety of media for batch mode centrifugation based separation of biomolecules. Cat. # 2070-050 (Empty, 50 pcs) Cat. # 2070-250 (Empty, 250 pcs) Cat. # 2080-050 （Sephadex G50, 250 pcs) Cat. # 2080-250 （Sephadex G50, 250 pcs) PP housing with 20 um PE frit Liquid tight screw cap for long term buffer storage Color coded cap for assist product classification 700 ul bed volume Accepts 50-200 ul sample volume Empty or prepacked with Sephadex G50 Ideal for proteian desalting or post sequencing cleanup for Sanger sequencing. Ideal for small volume batch mode His-tag protein purification, need Ni+ agarose Collection tubes sold separately Cat. # 2060-050, 50 pcs with collection tube Cat. # 2060-250, 250 pcs with collection tube PP housing with 20 um PE frit. 850 ul bed volume Attachd lid simplifies experimental procedure Empty column only, complete with collecton tube Ideal for proteian desalting or post sequencing cleanup for Sanger sequencing. Ideal for small volume batch mode His-tag protein purification, need Ni+ agarose Cat. # 2010-050, with collection tube Cat # 2010-250, with collection tube PP housing with 20 um PE frit. 850 ul bed volume Empty, complete with collection tubes Without attached lid Ideal for proteian desalting or post sequencing cleanup for Sanger sequencing. Ideal for small volume batch mode His-tag protein purification, need Ni+ agarose Collection tubes need to be order separately规格：Empty, 50 pcs Empty, 250 pcs Sephadex G50, 250 pcs Sephadex G50, 250 pcs 50 pcs with collection tube 250 pcs with collection tube with collection tube with collection tube