This breeding case has a large door and a wide opening (approx. 3.3 x 4.9 inches (85 x 124 mm)), allowing you to eat and contact with your bio-eyes. This is an all-clear case with a sturdy 0.1 inch (3 mm) thick design that makes it easy to observe the contents inside. The door stop prevents escapes and locks the door securely with a single touch.