Brass reducer. The internal thread is M13 (or 1.3 cm / 0.5 inch) and the external thread is M10 (or 1.0 cm / 0.39 inch). Handy if you want to attach to a M13 tube, for example, a fitting of which the thread is M10.
interne draad: M13 x 1
externe draad: M10 x 1
|Heigth (cm):||1.6 (0.63 inch)|
|Outer Diameter (cm):||1.5 (0.59 inch)|