The 54 feet of total linear wall length segments are modular to let you build dungeons any way you want. Is compatible with most 1 scale grid mats tile systems minis & other accessories. Manufacturered by Dirt Cheap Dungeons. Pieces come pre-textured so you do not have to paint them but still give you the flexibility to customize them if you wish. Only a small amount of assembly is required This set includes 300 pieces of various lengths of walls doorways doors & stairs. The many top clips and door clips in the package are not included in this number count.