Simple dishwasher status plaque. Fits together with an internal notch system and has 4 slots for 10x2.6mm magnets. Although the overhang for the battery slots is significant, it prints in place just fine without supports. Second plate contains other signage options. Available, Occupied. Open, Closed.

10x2.6mm magnets

https://www.amazon.com/dp/B07D8QPG2Y?ref=ppx_yo2ov_dt_b_product_details&th=1