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100PCS PTFE Membrane Disc Filter, Hydrophobic, 47mm, Micron Pore Size 0.45um, Excellent chemical compatibility Especially ideal for HPLC operation 47mm 0.45um Hydrophobic PTFE Filter Membrane auspowers_batchfour you don't even need to100PCS PTFE Membrane Disc Filter, Hydrophobic, 47mm, Micron Pore Size 0. 45um, Excellent chemical compatibility Especially ideal for HPLC operation Product Features PTFE membranes are inherently hydrophobic; they are ideal for the filtration of nonpolar liquids and gases 0. 45um membrane filter: It can filter out most bacteria and microorganisms; conventional samples and mobile phase filtration can meet general chromatographic requirements. Can be