Plug made might of milky white, transparant opalite glass. Depending on the light the plug can take different colours, from light blue to orange. Some are also more transparant than others. As they are whitish transparant these plugs cannot be photographed very well. Very special plug.
NOTE: these plugs are handmade. This means that they can vary a bit in size.
Furthermore these plugs have large flares in the sizes up to 5 mm. They are suitable if you have the same gauge for a long time already, or you can take one gauge size smaller.