|Heigth (cm):||1.6 (0.63 inch)|
|Outer Diameter (cm):||1.0 (M10) 0.39 inch external thread|
|Diameter of opening (cm):||1.3 (M13) 0.51 inch|
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).
The smooth exterior has a diameter of 1.5 cm (0.59 inch).
Handy if you want to attach to a M13 tube, for example, a fitting of which the thread is M10.