internal thread 1.0 cm / 0.39 inch (M10)
Hollow tube, so you can pull the lamp wire through.
|Outer Diameter (cm):||1.2 (0.5 inch)|
|Length (cm):||2.5 (0.8 inch)|
Shiny silver coupling piece, 2.5 cm / 1.0 inch long.
1.0 cm diameter.
Handy when you want to connect 2 (hollow) tubes together, for example.
Such as when you want to extend your hanging lamp slightly.
Here is a slightly shorter coupling piece, 2.0 cm / 0.8 inch length.