The Citadel / Grand Citadel Crenellations 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. This pack was specifically designed as an add-on to the Citadel / Grand Citadel. The item comes in both painted and unpainted versions.
The Citadel / Grand Citadel Crenellations Pack comes with these 36 pieces:
(28) Rampart Crenellation
(2) Accessory Slot Crenellation
(2) Crenellated Straight Wall
(2) Oil Cauldron
(2) High Crenellated Corner