Lot of six Cytiva / Whatman 6791-0402 Puradisc 4 sterile syringe filters for small-volume sample preparation, HPLC sample cleanup, biological sample filtration, buffers, aqueous samples, and other low-volume lab filtration workflows. These 4 mm syringe filters use a 0.2 µm PVDF membrane in a polypropylene housing and are designed for efficient filtration of samples up to approximately 2 mL, with female Luer lock inlet and male Luer outlet connections. PVDF is commonly selected for low protein binding, solvent resistance, and analytical sample prep applications where the membrane chemistry is compatible. This is a partial lot of 6 filters, not a full manufacturer pack of 50; buyer should verify sterility packaging, expiration/date code if applicable, and compatibility with their sample chemistry before use.
