This is a genuine ring cap for the GRIIIx. The color is purple. This item is a non-sale item that was a product registration bonus, so it is currently difficult to obtain. It is for the GR IIIx and cannot be used on the GR III. Please be aware. I purchased it, but I haven't used it because I was using a different color. There are no problems with the contents, but please understand that the box is slightly crushed due to storage, and that it is a used item before purchasing. It will be shipped via Yu-Packet Post with simple packaging. Please understand.