130-222 16" x 24" Tumbled Travertine Paver Walnut, 3cm Thickness. The natural stone is tumbled to remove the rough edges and smooth out the surface but still maintain a porous, pitted texture. This paver is perfect for high traffic areas due to its non-slip surface. This makes it safe for playing and walking areas even when wet. The material is known to withstand erosion and weathering allowing it to keep its appearance without too much fuss. It is also easy to clean and maintain and will maintain its elegant appearance for years to come.