Pipetting is a highly repetitive motion which can have lasting effects on your hand, wrist and shoulder. Biotic Lightface pipettes are designed to improve the ergonomics of traditional pipetting systems by reducing the forces youre exposed to during this repetitive process. The patented light force ejection system built into xTIP4 and Lightface produce the lowest ejection forces on the market, reducing your risk of developing repetitive stress injuries and muscle fatigue.