4 sizes, each with 5 fixed volumes for the range 1 to 5000 µl, no air interface between the piston and the liquid, d. h. almost no liquid remains in the tip, highest accuracy regardless the medium, also for liquids with high vapor pressure, for highly viscous media and for media with a high density, multiple use of stiks (pistons) and tips with constant high precision. Materials are resistant to nearly all aggressive media. Stiks and tips can be changed without risk of contamination; same color-coding on the unit, accessories and packaging practically rules out incorrect combinations of the various sizes.
1) Relative to the maximum volume
same color code as the unit, tips up to 50 µl made of glass, over 50 µl made of plastic, stiks made of rust-proof steel, stand for the unit and for storing tips and stiks.