The Prismcaps from SteelSeries fit on the SteelSeries Apex Pro Gen 3 Mini, as they are designed for mechanical keyboards with Cherry MX-compatible stems, which also include the OmniPoint 3.0 switches of the Apex Pro series. However, the OmniPoint switches have a slightly different shape, which is why some third-party keycaps may not fit perfectly or the LED lighting may not shine through completely. The Prismcaps are specifically compatible with Apex Pro models and also include replacement keys for non-standard keyboard layouts.