It is an easy-to-use egg case that contains two special cases that can store eight 3.5 (up to 4 depending on the size of the plane). It comes with a shoulder belt and a carabiner, so it is also attractive that you can use it according to your needs. If you put one army on the front side and the spare on the back side, you can exchange eggs smoothly even at the site. After fishing, you can take out the case and wash it with water.