The junction box is a how to be found in any hardware store. I had, however, ordered this, because the dimensions of 13 x 9.5 x 5 cm were reported. I assumed that the can is at least 9.5 cm in diameter.
That was not the case, there are the usual 7.5 cm, for which I have currently no use. Return is not worth it at that price, of course, but use will certainly find the can eventually elsewhere.
