Toilet Cistern Level Arm

This is a plastic arm for a traditional toilet cistern. It connects the handle bar to the plunger inside the cistern. Mine broke so I decided to 3D print a replacement.

It includes a recess and hole for a 3mm bolt. This prevents the arm sliding along the handle bar.

Distance between the holes : 55mm
Square hole : 8mm
Circular hole : 5mm diameter
Bolt hole : 4mm diameter
Overall height : 15mm/20mm
Overall width : 20mm/28mm

I'm not sure how universal toilet cistern arms are so this m