Non-sterile Diamond® PureFlow™ syringe filters are perfect for use in a wide range of filtration and sample applications where sterility is not needed. Non-sterile filters are used in analytical chemistry for sample preparation, HPLC operations, and protecting analytical equipment from particle contamination. Bulk packaged with filter membrane type and membrane porosity printed on each filter. Polypropylene microfiber pre-filter layer to improve filtration of particulate-laden fluids. Get the Diamond® PureFlow™ Advantage: Performance - High flow rates and low absorption membranes for minimal sample loss. Simplicity - Color coded outer ring allows easy identification of membrane and filter media type. Each unit is clearly marked with an identifying code to denote pore size and membrane material. Strength - Bonded outer ring on housing provides strength under higher working pressures for high performance needs Efficiency - Integral polypropylene pre-filter for high flow rates and fast filtration Quality - Manufacturing process certified to ISO 9001 standards