This is a shūmō-shin (hair-collecting needle) that was at my home. It was stored in its box and is likely almost unused (the box is dirty). A shūmō-shin is a type of "non-inserting needle" that stimulates by tapping. It is recommended for those who are not good with needles or for beginners. The strength of the stimulation is adjusted by the difference in the spring's resilience. "(Yū) Maeda Toyokichi Shoten" is the company that manufactures and sells this shūmō-shin. Length: Approximately 7.7 centimeters