Ø 13mm PTFE membrane, Pore Size 0.22 µm, low extractable syringe filters, 100/pk. RJF3222NH. Ø 32mm PTFE membrane, Pore Size 0.22 µm, low extractable syringe filters, 100/pk. RJF1345NH. Ø 13mm PTFE membrane, Pore Size 0.45 µm, low extractable syringe filters, 100/pk. RJF3245NH