Shop a large selection of Discs Filtration Membranes products and learn more about Merck Millipore Fluoropore PTFE Membrane Filters 0.45μm Pore Size; Dia.: Merck Millipore Fluoropore™ PTFE Membrane Filters 0.45μm Pore Size; Dia.: 47mm; White Merck Millipore Fluoropore™ PTFE Membrane Filters | Fisher Scientific