It's HOLLOW and held together with 24 barbed pins. Press them in firmly and squeeze segments together. Scales well.

The MINI size is roughly BASKETBALL size. MK3/X1C is HUGE.

The FIT will be tight, but it makes the spheres STRONG

Do not Drop spheres, they will break.

Assembly Instructions:

1. Put 2 pieces together to form ¼ wedges.
2. put 2 ¼ wedges together to make a half sphere.
3. Put 2 halves together at the same time.

If you do the wrong order it can become impossible to add the wedges.