This kit of objects is two hanging buckets set for a cheap bench power supply. One bucket is 100 mm deep. The other is 50 mm deep. They are held together by two arms that you must glue to the buckets. The buckets are 84 mm apart.
No support is needed.
This object main web page is: http://www.ctheroux.com/hanging-buckets-for-power-supplies/.
You can request the source files on the page listed above.