The 5/8 Rod is a more rigid polycarbonate . This can capture most anything. These include primates, reptiles, canine, felids, small ungulates etc.
Keep in mind the appendages, claws, teeth and temperment when selecting your mesh choice. This suspension works well with all net meshes, though use with the A or F meshes may be not be adequate to retain the animals this suspension was designed for.
The 115C is about 34x35. Suspensions are different so refer to the table on the Versa Net book marked page. This net is good for use up to 65lb or about 30Kg. It is not very flexible and remains rather rigid.
If your animal is very heavy or very strong, you may want to consider using the 3/4" rod instead. Because of the flexibility of polycarbonate, it may become too flexible if you overburden the suspension. Doing this will cause the net to become unmanagable. It is best to go to the next size up if you feel this could become an issue as the animal grows larger or stronger. Also, the larger you go in Circumference size, the more flexible the suspension will be.