BLUE. For pipettes up to 2 ml. Bel-Art. Designed for rapid, efficient, single-handed operation with either glass or plastic pipettes. Pipettes are safely and easily inserted into the soft elastic chuck and securely held in place by lightly tightening the threaded collar. Rotation of the thumb wheel draws liquid to the desired level. To empty rapidly, apply light thumb pressure to the fast-release lever. For gradual dispensing, rotate wheel. Pump never comes in contact with liquid being pipetted. Resistant to acids, alkalies and solvents. Easily disassembled for thorough cleaning. Color coded according to pipette volume.