It's a morphing pet necklace. It acts as an equipment item for pets that don't have their equipments in the game. Here's a screenshot of the description:
Hi Gert, E6 - can I confirm if this item is rash reaction? G5 - this is the transparent face acc? If the answer is yes to both qns, I will like to get them both pls! Thank you!
E6 is Allergic Reaction G5 is the Transparent Face Accessory Let me know you're IGN if you're online right now and I can sell you G5