Titan3 PTFE (Hydrophobic) Syringe Filter 0.45 µm, 30 mm, with Pre-Filter, 100 Pk. Diameter (Metric) 30 mm: Diameter (Metric) Membrane: 30 mm: Disposable: Yes: For Use With (Application) Sample Filtration: aggressive organic, highly basic, or hot solutions, aqueous solutions without prewetting with an alcohol: Hold up Volume (After Air Purge) <157 μL