A generic L shaped bracket with some strengthening elements. Due to the nature of 3D printing this is not a structural or load bearing component but can be used to connect two items at 90% to each other.
I'm using 2 of them to keep a bookcase steady against a wall.
I've added a dimension image showing the outside dimensions of the bracket ( 140mm x 15mm x 30mm ). Thickness of the bracket is 5mm (both horizontal and vertical sections), hole pitch is 20mm and the holes are 5mm dia
Standard Robox "Normal" profile
Used 100% infill in an attempt as getting a bit more strength into the bracket, but in reality it probably makes little difference and 60% would likely have been ample.