Magnetic Probe Holder for Testo Bluetooth Handle 05541111

This is a magnetic printable holder for a Testo Smart Probe Handle (05541111), designed for use with TPU Filament.
There is an opening for inserting an Neodym magnet.
The magnet snaps in the opening, so the magnet should have the following dimensions:

20x19x4 mm

It should work with smaler magnets, but the thickness and one side should match the given dimensions.