Whatman Uniflo Syringe Filters are disposable units designed to provide clean filtration from small volumes up to 100 ml. They are available in a variety of membrane options with a polypropylene housing. Syringe filters are available from 4 mm up to 30 mm. Pore sizes from 0.1 micron to 1.0 micron. Sterile or non-sterile options.