Pieces include: 15 - 1"x1" unpainted straight walls, 15 - 1"x2" unpainted straight walls, 15 - 1"x1" unpainted inside corner, 15 - 1"x1" unpainted outside corner, 15 1"x1" unpainted stalagmites, 15 1"x1" stairs, and 5 1"x1" stair mini holder. Patented easy-snap design allows you to build and take apart in seconds! This tabletop terrain is a fun engaging and interactive 3D alternative to paper adventure maps or a dry erase map. The Cavern Expansion Set is fully compatible with your Dungeons and Dragons, Pathfinder, Savage Worlds, Frostgrave, and other gaming systems. Compatible with all our Adventure Terrain and Mini Figure Sets and other 1-inch grid systems allowing you to build endless designs for all your campaigning needs.