Whatman Syringe Filters, 0.2um, Pore Size: 0.2um. Syringe Filters, 0.2um. Whatman syringe filters can be found in different diameters, pore sizes, and membrane types. Select from sterile or nonsterile versions without or with prefilters.Syringe filters are the primary option for analytical sample filtration. Regular Price: $505.85.