ECHANICAL TOYS STEAM ENGINE Live Steam Engine Steam Crawl Robot Model Mini Steam Engine Creative Gift Its length measured 130MM, width 110MM, high 90MM, weight 300G. It is made of copper and stainless steel. The whole is quite compact. Behind a mini steam engine provides strong power. It has a 2 ml fuel tank in front of it. Power through the pot slows down through the middle gear in synchronism with the front and rear drive gears. It's designed with a small chair on the front, and maybe you'll find a suitable villain to manipulate it. It's very good to walk. I believe you will like it and have it. Working time is approximately 5-10 minutes.