Membrane Filter Papers 0.45 Micron Nelone, 47 mm for Laboratory use: Amazon.com: Industrial & Scientific
Merck Medical Millex™-HP Syringe Filter Unit, 0.45 μm Medical Millex-HP Syringe Filter Unit, 0.45 μm, polyethersulfone, 33 mm, sterilized by gamma irradiation Non-Sterile Syringe and Syringeless Filters | Fisher Scientific