What does “23G fitted tubing” means ?

23G hypodermic needles and steel adapters are commonly used with tubings to inject or extract liquid samples. They are described by gauge numbers indicating outer diameters (OD). Among those values, the 23-gauge (23G) is a standard in both Medical and Microfluidic fields. With a “23G fitted tubing” the sizes of tubing & needle fit, so that the 23G needle can be smoothly inserted into the 1/16″ microfluidic tubing.

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