Red colored Luer Lock hub with a 25-Gauge blunt tip. The Inside Diameter is 0.010" (0.250mm) and the Outside Diameter is 0.020" (0.508mm). 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.