The box is well suited to safely transport two adult gerbils. The animals like it is quite good, and the lid is tight enough so that they can not climb out. The flap is held by only two plastic hooks and one should look good, that she sits quite firmly because otherwise the animal can open by jumping against the small flap. Super unlike other boxes is that the ventilation grills can not be achieved and are not corroded. It is unfavorable that the box for the rest of the animals ever again have to put in a bag (because transparent) and the plastic is immediately blinded by disinfection, which does not look particularly nice.