These pre-sterile P20 pipette tips include a barrier and work with the Biomek NXp and FXp Span-8 systems. Barrier tips reduce the possibility of sample cross-contamination from aerosols. Like all our pipette tips, the P20s are made of 100% premium grade polypropylene. The innovative Span-8 tip design lets you automate processes more efficiently, such as compound retrieval, consolidation and reformatting to and from a variety of labware types. Capacity for each tip (including air gaps) is 20 μL. Case of 10 racks.