Iron wood is actually black Arang wood. These black wood plugs have a slight lip and groove. The face is concave, it curves inwards. This makes the plugs slightly lighter and give an interesting visual effect. This perhaps one of our most popular items and one that I personally wear as my standard long term plugs.

Due to the nature of the wood, once the plugs get to the very large sizes, it's not possible to have solid black plugs, so the 32mm, 35mm and 38mm sizes have dark brown grain as well.