These new ProTip low retention tips are manufacture recommended for excellent compatibility with Microlit RBO and Micolit Nero pipettors. All these pipette tips are certified free of detectable Rnase, Dnase, DNA, PCR inhibitors, and tested pyrogen. These feature exceptional clean release and are considerably more hydrophobic than standard tips. Both micro (up to 1000uL) and marco (up to 10mL) Tips are available in standard and filtered varieties.