Pipette filler Pi-pump made of acid-proof plastic, suitable for all pipettes. By turning the knurled wheel, a piston is moved and liquids can be sucked up or released from the pipette. This technique allows for safe and precise pipetting by hand. Releasing the liquids precisely, i.e. line by line, is easily possible. Sizes 2, 10 and 25 are additionally equipped with a fast release valve which allows for free release of liquids instantly.