... 50-250ul,100-500ul and 200-1000ul .Pictures:1 Structure:2 One of the advantages:3 Different types ... for convenient use, reliable performance.Method of Use: 1. Put the nozzle on the pipetting head, and ... button to the first stopping point, waiting for 1-2 seconds, then push the button, exhaust all ... button, that is a complete operation process.Attentions: 1. The pipette belongs to precise measure, do not ...