Magnetic Ring system for Air Conditioner exhaust

This is three parts, with magnets in each part so they attach to each other securely. Magnets I've been using is 10mmx2mm N52 magnets. You'll need to add a pause at 3mm for the ring and attachment to put the magnets in. Same pause but at 4mm on the cover. There's absolutely zero extra space, but it seemed to print fine for me without it.

One is a ring, to be attached to the thing covering the window. I used a perspex sheet cut to size with a 150mm hole, but could be anything solid with a 150mm hole that you can stick the ring to with something.

Second is a cover for the ring, so you don't just have an open hole when you remove the air conditioner hose.

Third is an simple attachment to the air conditioner hose. It has holes around it that I used for zip tie attachment points.