ACEdc Donut Mini Crystal Ti Rainbow This is a haptic coin from ACEdc. The material is crystallized titanium, and it has been color-treated to a rainbow finish. The diameter is 36.4mm and the weight is 45gm. There are no noticeable scratches or stains, but three of the internal magnets have come off and need to be reattached with adhesive. It will be shipped with a dedicated case.