Description_x000D_ General description_x000D_ All units contain PTFE filter membranes in plastic housings with Luer lock inlet and Luer slip outlet fittings._x000D_ Units smaller than 25 mm diameter are specifically designed to minimize hold-up in filtration of small volumes. The 3-4 mm units are recommended for volumes of <1 mL; the 13 mm units are recommended for volumes of 0.5-10 mL._x000D_ Application_x000D_ HPLC; aqueous and organic solvents and solutions_x000D_ Suitability_x000D_ Suitable for filtration of biological samples._x000D_ Legal Information_x000D_ Millex is a registered trademark of Merck KGaA, Darmstadt, Germany