Cat collar magnet thing
thingiverse
A replacement collar magnet to open magnetic cat door. I bought a magnetic cat door from Bunnings and Mutzi lost the collar before he even worked out how the use the door. Bunnings didn't seem to have spares and nor did the pet warehouse I tried. Instructions I printed in PLA at .2mm. The two pieces slide together with the collar in place. 7 - 5mm square magnets (dx.com) were first pushed into place. Super glue was added to both the join and the magnets. Collar width is about 11mm and 1.5 thick.
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