This part is for the end of an air conditioning pipe (exhaust hose). It can be attached to the end of the pipe. You can print it out twice and then attach the counterpart to a suitable place, such as a wooden board. The holes are for magnets. Very strong neodymium magnets are recommended so that everything lifts.

The dimensions are
140 mm in diameter
19 mm in height

PLA is strong enough to hold everything.