The Portal platform consists of an electromagnetic actuator controlled by a computer that generates a jet of liquid with a diameter that is about 1/3 that of a 27 gauge hypodermic needle ...
For medium and large lizards, a 25-gauge needle of length 1–1.5 in is attached to a 3-ml syringe. For small lizards, a 27-gauge needle of length 0.5 in is attached to a 0.5- to 1-ml syringe.
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