SYSTEM RACK (PC): Tough & extremely durable The body and lid are made of polycarbonate(PC), which does not lose its shape over time. It can also be autoclaved repeatedly. RNase/DNase/Human-DNA free certified. --Pipette tip compatibility--- Watson NEXTY : 20-200ul(M)/200ul(F), Eppendorf Reference/Research V : 50(20)-200ul, Gilson Pipe man : P-200, Finn pipette Digital : 20-200ul, Biohit Proline : 20-200ul, Nichiryo Nichipet EX : 20-200ul/40-200ul(M).