Fills a gap between the 500 and the 5000 already on the guide and it's much more impressive than the photo (which doesn't do it justice at all) as it is sort of reflective.
Looks like possibly glue marks on the back too but only showing 1 side as it is the same on the other.

I know that it looks red but is actually purple when seen at an angle.
Another nice one to find anyway.