The Diamond APEX series of pipettors are quite simply one of the best lines of pipettors available today. The magnetic assisted piston ensures the best consistency with each plunger motion to the first and second stops for aspiration, dispense and touch off. A new spring and seal design allows for one of the lowest plunger force requirements to help reduce fatigue. An innovative silicone shock absorber in the tip ejection mechanism further assists in reducing fatigue, and the corrosion-resistant alloy used in the tip ejector mechanism greatly enhances durability. PVDF tip cone material aids in durability against corrosion and shock. Diamond APEX pipettors are calibrated in an ISO17025 accredited facility and come standard with a 3-year warranty.