This is a fantastic body tube and everything else for BT70 fitted perfectly inside it. I really can't find any flaws in this. Its a body tube made out of an aerodynamic cardboard material. Nothing much to say other than it works perfectly and when you paint it, the paint completely hides the fact thats it's actually cardboard and makes the entire rocket look very realistic. If you need a BT 70 size body tube this simplistic yet effective product will not disappoint.