Devices that measure and transfer small amounts of liquids and fill by capillary action; may be used with bulbs or calibrated to a specific volume; application-specific designs include those used with blood samples and melting point determinations Blood Capillary Action Tubes, commonly referred to as Pipettes are used for Blood Sampling, Sampling of Serum or Plasma, for various types of Lab work and in Blood Banks. Also called Transfer pipettes, they are widely used in Labs and for Blood culture and Urine analysis.