This is a standard 4040 profile with a length of 120 mm.
This part can be used to replace the standard metal profile which might possibly improve EMC-characteristics for the inductuve perimeter sensor.
The picture shows a 30 mm-version for illustration.
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Using white PETG I got a really sturdy profile. The M8-screw holds very tight in the center hole. I don't know how many re-insertions will be possible until the thread wears out.