Clean Dirty Magnet for Dishwasher

Made to work with 3x4mm barrel magnets like these: https://www.amazon.ca/gp/product/B075PM7HZ6/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

It's already got some extra tolerance so the magnets could fit in. total diameter for the holes is 3.5mm. I left the depth at 4mm.