Fisherbrand Laboratory Automation pipette tips natural 1000ul Tecan Fisher Scientific Desciption: Tips are constructed of a highly conductive material necessary to detect the presence or absence of sufficient liquid, in order to avoid short sampling and excessive submersion of tip during aspiration. Disposable tips for robotic workstations provide maximum performance, accuracy and reproducibility in laboratory automation procedures Available in clear, blue tint, or carbon-black-conductive polypropylene Carbon-black, liquid-level-sensing tips are required by many automated systems