The sturdy PiRack™ Clamp-On Pipettor Holder supports many standard brands of pipettors and keeps them safe and within easy reach. Simply attach to any shelf 28mm (1") thick or benchtop edge using the large locking thumbscrew clamp. Add extenders to increase the number of holders at a work location. Made from polypropylene, the holder is strong enough to support the weight of even the heaviest pipettor. The utility tray, mounted between two clamps, is ideal for storing pipetting supplies or holding pens and pencils or other small items. It is perfectly sized for Scienceware® No Wire™ Half Racks available to hold tubes, vials, mini tubes and cuvettes. All components are chemical resistant and steam autoclavable at 121°C (250°F).