Economic Choice Syringe Filters are available in a variety of sizes and membrane types to meet any application need. Choice PVDF (Hydrophobic PVH) Syringe Filter 0.45 µm, 25 mm, 100 Pk. Choice PVDF (Hydrophobic PVH) Syringe Filter 0.2 µm, 25 mm, 100 Pk. Choice PVDF (Hydrophobic PVH) Syringe Filter 0.2 µm, 13 mm, 100 Pk.