The ALU BRUNO end cap closes the end of a LUMINES BRUNO profile. It is aluminium in the raw finish, that is with no lacquer coat, and its face carries an elongated opening for the cable. Flat tabs stand out from the back, and they are what the cap is pushed into the profile's channels by.
Which profile it belongs to
The manufacturer assigns this item to the BRUNO system alone. LUMINES end caps are shaped to one specific cross-section, so a code from another family will not enter this profile, however similar it looks.
BRUNO itself is a recessed ceiling profile mounted against the wall and made to be plastered in. It takes two LED strips up to 10 mm wide and produces accent light with a shadow-gap effect.
What the versions mean
The manufacturer lists the side of this cap as universal: the same piece fits either end, so closing a run does not mean picking a separate left and right version. The opening in the face is there to bring the supply cable out, and the description "for building in" refers to a shape meant to be covered by the wall finish.
The same family offers aluminium caps in white, black and silver, and ABS versions in white, black, silver and grey. The raw one is the only one with no surface finish. The cap finish is chosen to match the profile: BRUNO is made white lacquered, black lacquered, silver anodised and raw.