The Battlement Transitions Pack is part of the Castle Builder System. It is made of "Dwarvenite". This item was initially available as an add-on to a pledge level during the Castle Builder System Kickstarter. It was not advertised during the Kickstarter campaign but was made available during the final order. The item comes in both painted and unpainted versions.
The Battlement Transitions Pack comes with these 4 pieces:
(2) Battlements Transition – Left
(2) Battlements Transition - Right