Each box contains the following Citadel multi-part push-fit plastic miniatures and terrain:
10 x Astra Militarum Kasrkin Kill Team Squad miniatures
8 x Necron Hierotek Circle Kill Team Squad miniatures
45 x Gallowdark Terrain pieces - Modular walls and doors which can be arranged in many layouts as well as a sentry turet, robot crawler, secrutiy panels/cameras, lockers and equipment stashes

Each of the above miniatures come supplied with a Citadel bases. Also in the box:
1 x Shadowvaults Manual - A supplementary 120 page book containing rules and background for the two kill teams included in the box as well as background on the Gallowdark Space Hulk and missions
1 x Double sided Shadowvaults Gameboard