I’ve seen some other adapters but I wanted to make one of my own. The holes are for 20mmx3mm magnets, 2mm magnets are generally too weak to support the weight or pull of a hose depending on your set up. Fits 4-inch hoses with a max 94mm diameter.

Printed in Polymaker PETG, the leg support is optional and can be cut off in the slicer if you feel it’s unnecessary. I wound up printing mine in PLA after the fact as I found I still needed the extra support.

Happy printing.