Eppendorf Combitips Advanced Tips utilize a positive-displacement design to ensure high accuracy, even when handling viscous or high vapor pressure solutions. The polyethylene plunger and polypropylene cylinder make them suitable for use with most reagents. A hermetically-sealed piston prevents aerosol contamination, an added layer of protection when working with aggressive or toxic materials. An elongated tip makes it possible to empty all standard laboratory tubes completely. The funnel geometry helps prevent damage to gloves and ensures comfortable handling. Choose from three grade: Non-sterile, sterile or Biopur grade, certified pyrogen, Dnase/RNase-, PCR-inhibitor and ATP-free. Graduated and individually color coded. 25 and 50 mL tips require adapters, purchase separately. Provided in four bags of 25 tips.