Membrane filter funnels successfully extract particulates from fluids prior to electron or light microscopy procedures. These devices that allow this microbiological elution, concentrate the fine particles on standard filter paper while simultaneously purifying the filtrates. Choose multi-piece apparatuses or all-in-one formats in any reservoir capacity. Interior ribbing provides a high-speed filtration flow, while external ribbing prevents airlock. The pre-sterilized membrane filter funnels come ready-to-use for contamination-free applications.