This is a War of the Worlds playset, when cut it renders 3 "walkers" and 8 tanks. The tanks are approximations of the WW1 british MK1 tank. The file is designed for 1/8" service board, which actually measures to 2.9mm to get a tight fit, scale the model as needed to fit your material. At the current size both the walkers and tanks are scaled to about 1/200.