Labcon automation pipet tips APT for Beckman FX, NX and other brands are designed and tested to fit your workstation. Made from pure pre-tested medical grade resins to ensure the integrity of your work. Each lot is tested and certified free of ATP, RNase/DNase (Nuclease), and Endotoxins (non-pyrogenic). Resins are pre-tested with a USP test method to ensure they are free of Oleamide and Phalates. Unlike tips sold as "pre-sterile" these tips use a validated medical grade sterilization process. So you can use these tips in diagnostics, regulated testing, and medical screening procedures.