8cm shelf bracket for Element System 32

I found Element System 32 in Bauhaus, but they are not carrying it anymore, and I couldn't find an 8cm shelf bracket anywhere, so I made this in Plasticity.

It's a tight fit, but printed with 6 walls it feels like it's probably strong enough for an 8-12 cm shelf.

I printed in PLA, 0.4mm nozzle and 0.2mm layer height, with 6 walls and 25% infill, but fewer walls and less infill could probably also do it.