Although there are many types of syringe filters for filtering the solutions used in filling microinjection pipettes, most of them are inadequate for tips with inner diameters smaller than 0.6 µm. Syringe filters with membranes made of PTFE, nylon, or cellulose acetate may claim pore sizes as small as 0.2 µm, but that designation only means the average pore size is 0.2 µm - particles as large as 1 µm will still pass through. Liquids filtered through them will still clog a 0.5 µm ID tip very quickly.

These Anotop filters, however, have homogeneous pore distribution. Anotop filters also come in a pore size 10 times smaller than any other filter: 0.02 µm! With this filter and a MicroFil filling needle, you can normally pump more than 500 nl of fluid before clogging occurs.

In packs of 50 filters, individually sterile packed.