This is a pack of styrene sheeting for scratch building and customizing plastic models. It is also known as plasticard, pla plate and polystyrene sheets! It is UV resistant and easy to cut, sand and cement. This assortment pack contains one each 6″ X 12″ sheets of the following thicknesses: 0.010″ (.25mm), 0.020″ (.50mm), 0.040″ (1.0mm).