Zombie head
Rag was removed from RuneScape after an update, but still exists in-game for those who had obtained it.
[FAQ] • [doc]
Rag detail

Rags are items used during the Unstable Foundations tutorial. They are made by ripping the cloth found in Sir Vant's bag in half. They are used with Sir vant's oil can to make an Oily rag which is used to help kill the dragon.