Will not try and dial the pipette further than twentyμL, as this could crack the pipette or bring about it to be unreliable in its volume. Eight variable quantity MicroPette's from the assortment. Quantity adjustment is selected by turning the thumb plunger mechanism. MicroPette's are calibrated in accordance ISO/DIS 8655. https://pipette-types-images46554.blogofchange.com/29898520/everything-about-types-of-pipettes-with-pictures