The box is built up very quickly - even alone. The aluminum bar is necessary, with a pair of pliers to turn on the ends just to insert the plates. But this is absolutely no problem. The box is very stable and also for large dogs (> 50 cm) ideal. The only drawback is that the box is quite heavy, but easily used for a "strong" adult in the car. In the product description information is missing about the dimensions and weight.
