Orange colored Luer Lock hub with a 23-Gauge blunt tip. The Inside Diameter is 0.013" (0.330mm) and the Outside Diameter is 0.025" (0.635mm). Jensen Global NT Series Premium polished tips feature a polypropylene plastic double-helix hub with a UV-bonded stainless steel cannula. The burr-free tip design allows for precise dispensing with no residuals.