A loop for Hormann Remote Control Protective Sleeve (HSE4BS, HSE2-868-BS) such as Hormann HSE protective case by Jakub Kalfař or HORMANN Coque pour télécommande by nico206.
Material: PLA
Layer height: 0.2 mm
Perimeters: 3
Infill: 15%
Supports: no (if you have decent cooling)
If you broke yours like I did, here is a list of replacement parts I found and made to repair mine.