Thomas 138030PLTS Polyethylene 8mL General Purpose Transfer Pipette, Large Bulb, 152mm Length (Case of 4000) 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 Non-slippery - easy to grip with gloves; Temperature range: -196 - 9 degree C Measures 152mm length, 6.2mm stem diameter, 3mm tip diameter