Sterile Syringe Filters Wholesale – HPLC Vials Membrane: PTFE, PVDF, PES, MCE, NYLON, PP, CA, etc. 2.Pore Size: 0.22um / 0.45um 3.Diameter: 13mm / 25mm 4.House Material: PP 5.Sterile option for critical Inquiry We respond quickly to any questions, inquiries, needs and feedback.