220-MC12A, 2 - 20 ul Multichannel 12 Channel Pipette. Features: Quick, easy volume setting... simply turn the plunger. Click stop digital adjustable volume mechanism. Easy to calibrate and service... calibration tool supplied. Ergonomic, lightweight design with a soft plunger movement. Two stage plunger operation for "blow-out" step during pipeting. Individually calibrated in accordance with DIN 12650 Standards and supplied with a computer generated calibration report. Fully Autoclavable to avoid cross-contamination. Color coded by volumes for easy identification. Nozzle assembly rotates 360 degrees.