 Exactly. They're intended, you know, by the name expansion joint. They're supposed to allow the slab to grow a little bit when it heats up in the summer, shrink a little bit in the winter. But, you know, really a piece of wood is not the ideal material. You want something in there that's flexible, that's rubber. And that's a rubber-like material is exactly what trim slab is. Well, I also need to get back to a point where you just mentioned about the deterioration of these expansion joints.