Respiratory Filter, Hmef, Bvf manufacturer / supplier in China, offering 50mm Vent Filter 0.22/0.45um Sterile or Non PTFE/Pes/PVDF for Lab Use, Lab Ans Biotechno Application Research Sterile 25mm Mce/ PTFE/Pes/Nylon Syringe Filter HPLC, Portable Medical 25ml 40ml Vacuum Extractor Mucus Sputum Suction Mucus Extractor and so on.