This is replacement part for Mivardi Swing Arm, original part broke, so there is part in two versions to print.

100% infill, or 12 walls for strenght, use PETG, PLA will work too, but mind it may soften in the direct sun.

There are 2 versions, one is easier to print, because you wont need to use supports, which are not easy to print with PETG.