Transfer Pipet Exact Volume 200ul Samco Produced from chemically resistant, low-density polyethylene (LDPE) to make them non-slippery. This makes pipets easy to grip with gloves. Designed to dispense precise volumes. Non-toxic and chemically inert to biological fluids and most acids. Can be heat sealed to use for liquid storage or transport. Pipets can be frozen in liquid nitrogen. Avoid cross-contamination with these disposable transfer pipets.