This is a PCB Holder. It fits on a 20mm Aluprofile.

You need: 4 hexagon Screws, M5x16. 2 M5 Nuts and some washers 2 Allen Screws (Inbussschraube) M5x40 (test it with your spring length) 2 short compression springs 2 M4x10 screws

You have to heat up the Screws, to push them into the Knobs.

Print the holders with the tube pointing upwards.