This air displacement micropipette allows subsequent pipetting of 1 and 0.1 mL of same liquid. The two pre-calibrated fixed volumes eliminate any setting. A universal metal nozzle accommodates straw tips (length 190 or 240 mm, diameter 4 mm), most adequate to aspirate from deep, narrow vials or Stomacher bags. Ideal alternative to conventional graduated glass pipettes when performing serial 1:10 dilutions in bacteriology.