325-11 EachSamco Universal Pipette, 13.7 mL Prevent cross-contamination with Thermo Scientific™ Samco™ Transfer Pipettes, which have a built-in bulb that eliminates the need for plugging, packaging and autoclaving. Samco transfer pipettes are made of shatterproof, nontoxic polyethylene. Their low-affinity surface prevents proteins binding in research applications. They can be frozen in liquid nitrogen, or heat sealed for storage.