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PES membranes are commonly used as prefilters in many filtration devices and for filtration of viscous or otherwise hard-to-filter samples with high solids content. Specialized glass membranes are used for DNA recovery and clean-up. Syringe filters are often one-time use only. Amtast provides full line of Syringe Filters, if you are new to choose the filters, better to check following questions then choose the proper filters. If you are still not sure, email us then we choose for you. 1. Compatibility. What kind of solution to filter? 2. Filtration area. The volume of sample to be filtered? 3. Pore size. Sterile filtration or particle removal? Target size? 4. Hydrophilicity & hydrophobicity. Can filter be wetted with the solution or solvent? 5. Sterilization method. Which method do you prefer? EO, gamma radiation or autoclave? 6. Inlet/outlet connection types. Which connection fit? FLL/MLS or MLS/MLS or FLL/MLL? 7. Dimension. Does the filter dimension match?