Construction is passable, but it is annoying that the steel cable and grid are riveted in. Although, the cable came loose very easily after trying to rotate it out of the way, so that’s a win in my book.
The measurements of 12.5x12.5 cm are as specified, but my PAR30 fixture requires 16x16cm, which I did not realise before buying. Apparently the filter frame sizes are not always standardised.