This is a remix of Rubber Feet Extender/Raiser made by Viccroy, to be used with round rubber feet which came with MK3S kit.
To assemble, use one M3 nut and one M3 20mm countersunk screw to secure the latch to the body, then insert the original rubber foot into the body.
Installation is done the same way as the original foot, simply insert into the extrusion and rotate 90 degrees.
The author hasn't provided the model origin yet.