Genmu Jr series has 3 types and it fits different types of men with different needs. It has the Gundam element and your Genmu Jr can fight with you until the last moment. Genmu Jr has the design of Gundam and make you be the part of the Gundam fighter. You only need to press the top and the bottom at the same time and you can enjoy your special pleasure with your Gundam. The inner layer is surrounded by a sponge, creating more resistance and enhancing pleasure.