Professional sterile hplc syringe filter for analysis 25mm PES Membrane Analysis 0.45 Micron Sterile Syringe Filter For HPLC Introduction Green Mall sterile syringe filters are independently packed, available with PES,PTFE,PVDF, Nylon, MCE, CA, & pore size 0.22,0.45, 0.8μm. gamma radiation sterilization, DuPont analyzer.