Iron

Iron bars appear in Airfield Chase, Smugglers' Plane and Angry Birds Space. If you hit it, it will make a "ching" sound. Iron is a hard material to break. Chuck, Terence, Bomb, Matilda, Mighty, and sometimes, Al and Bubbles can break the iron. However, in Angry Birds Space, iron is more fragile. Stella might trap the iron in bubbles if she is in Rio and Space.