Add an extra layer in between your cutting plates by using the Purple Plastic Shim for the Gemini Midi. Shims are used in die-cutting to make the cutting-plate-die-paper-cutting-plate sandwich a little bit thicker. This helps to get an even more precise cut from your dies, especially if they are highly detailed or thin. This shim measures 6" x 9". To care for your shim, please flip and rotate after each pass. If the shim does start to bow, flip over and pass through until it is flat again, then continue to flip and rotate as normal.