Respiratory Filter, Hmef, Bvf manufacturer / supplier in China, offering Factory Supply 0.22um 0.45um PVDF Syringe Filter for Laboratory Use, 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 and so on.