The thumbwheel on this pipettor allows the operator to easily aspirate or dispense as little as a drop at a time, or to blow out the pipet-yet maintain a relaxed grip. A fast-release trigger dispenses the pipet's entire contents. This pipettor is resistant to acids, alkalis, and most solvents, and can be disassembled for cleaning. A self-stabilizing collar inside the silicone chuck holds a glass or plastic pipet. Color-coded. Overall length, 6 3/4". Red. For pipets up to 25 mL.