When I started RC, i started with helicopters as I couldnt carry plane to the fields on Activa (and didnt have a car back then). So I created this box myself so I can keep the heli in this and in the front of the activa. Now I have no use for it. I have dropped this many times with Heli inside this and its very durable. Feel free to pick it up in the next couple of days after which I will be discarding this. For 450 size helis.