This mini pipette includes a two step plunger that facilitates super blow-out from the tip (last drop dispensing), resulting in very high accuracy and precision. This allows the pipette to be used for reverse pipetting and repetitive pipetting. The pipette is fully autoclavable at 121 degrees C and 15psi. It's plunger is color coded for different volumes for easy identification in the lab. Pipette is individually calibrated per DIN 12650 standards. Also, the pipette is manufactured in an ISO 9002 certified facility. 250 uL volume.