4472 0.45 µm 250/pkg 750/cs NA 0 Acrodisc Syringe Filters with PTFE Membrane, 13 mm 4552 0.2 µm, minispike outlet 100/pkg 300/cs NA 0 4553 0.45 µm, minispike outlet 100/pkg 300/cs NA 0 4555 0.45 µm, minispike outlet 1000/pkg NA 0 Acrodisc Syringe Filters with PTFE Membrane, 13 mm 4423 0.2 µm, male slip luer outlet 100/pkg 300/cs NA 0