It's a severed arm, but you probably figured that out.

I keep meaning to forget, a new company I found, Specter Studios, is a local costume and prop company located in Sharpsburg.  And if you’re looking to have an order for Halloween, you have to place it by the 10th for guaranteed delivery.

I really love the plague doctor costumer, Raven mask and Penguin mask (which I think would be fun to wear to Consol, actually).  Check out their online store here for all kinds of complete costumes, severed limbs, awesome beanies, wings and a lot more!