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Filter caps are available in three nominal pore sizes 5.0µm, 0.45µm, and 0.20µm and are for use in our positive displacement autosamplers. The 708AL positive displacement autosampler may be found in our product section and the filter caps may be found in the Vial and cap section (you must be a registered user for this section) of Catalog Shop. For more information about the performance of this product please read this comparison. (PDF Document)