1)Unique piston mechanism 2)Dual graduation marks 3)Springless valve design 4)Eco-friendly 5)Easy handling 6)Easy to calibrate 1) Unique piston mechanism - Cleaning of piston and cylinder without affecting the calibration 2) Dual graduation marks - readability of the volume from both sides 3)Springless valve design - leads to smooth functioning and high chemical resistance. 4) Eco-friendly - while discharging the tubes in the re-circulation mode, in fast priming, the reagent is being redirected back into the bottle, eliminating any waste of precious reagents, ensuring safety and savings 5)Easy handling - discharge tube with 360° rotation, makes the bottle label visible all the time / telescoping filling tube compatible with different sizes of reagent bottles / ergonomic grip 6)Easy to calibrate - complies with ISO 8655-5 standard