Lightweight yet durable, these pipettors have an ergonomically shaped grip that provides a comfortable, familiar feel even during extended pipetting sessions. In addition, they are comfortable in either hand, as well as in large or small hands. The volume setting is continuously adjustable using the recessed thumbwheel or the dispenser button, and the slender, tapered shaft allows use in narrow tubes and provides universal tip compatibility. Pipettors can be autoclaved repeatedly without recalibration.