Wide tip opening helps prevent damage to fragile cells and genomic DNA during pipetting. May also be used with viscous solutions for greater accuracy. RNase, DNase, DNA free, and non-pyrogenic. Polypropylene. For use with ErgoOne®, Biohit®, Pipetman®, USA Scientific®, Finnpipette®, Eppendorf®, Nichiryo, Oxford Benchmate®, and similar pipettors.