PTFE Syringe Filter. Leading Supplier of PTFE Membrane Filter.Contact with Aijiren for High Quality PTFE Membrane Filter. บริษัท สมาร์ท ไซเอนซ์จากัด. Jun 15, 2022 *Good for filtration of gases, aggressive chemicals, Application notes of syringe filter. Pore Size: 0.22μm and 0.45μm. 4mm. 13mm.