What are these example files included with printer

These files are on the Wiki for the printer, and I am wondering what they are?

      {"src":"https://forum.creality.com/uploads/default/original/3X/2/8/28cfbde1ea8c784e4e1abcbdcb9c70a70071acaf.stl"}

      {"src":"https://forum.creality.com/uploads/default/original/3X/9/6/96da8dc682f61266b84d534828b9ec909de4e3bd.stl"}

      {"src":"https://forum.creality.com/uploads/default/original/3X/e/f/ef787de3f8e40bb8b1ce3e3d6a92a243bd58d52e.stl"}