Two broken bones . The dimensions of two of the bones are : X: 33.1 mm. Y: 19.6 mm. Z: 5.8 mm. It is ready to print. I am sure of that and check it in blender. It has : Non-Manifold :0 Intersections :0 zero faces and edges: 0 non_flat faces :0 Thin faces :0 Sharp edges: 0 I tested in Cura, too, and everything is good. I hope when you print It not have any problem.
Note: The model contains two pieces : bone 1 and bone 2