Magnetic plates 100 pieces - self adhesive - 20 mm x 20 mm - Thickness: 1.2 mm - black - TimeTex 93290 - self-magnetic plates - Magnets (Office supplies & stationery)
I have also magnetic plates from other manufacturers tried, because I appear a bit pricey by TimeTex, but none are as good. Since they can also be super cut, I always come back to the TimeTex platelets and order several at once, to save on shipping.