Holds 36 switches per layer Compatible with Cherry MX switches Stackable Prints with no support Tight- this has tight switch cutouts so switches won't fall out, good for long term storage and if you plan on moving switches Loose- this has loose switch cutouts so switches won't snap into place, they'll only sit there, can be used as a lube station or if you need quick access to switches V1- this has tight switch cutouts with gaps on the sides so switches won't fall out but leaves room to close an open switch V2- same switch cutouts as V1 but uses the V2 frame Tight and Loose use V2 design and save on print time and materials