The MyStim Slim Finn is a long and smooth urethral tool that is ideal for specialized stimulation of the penis. With some practice, the 6 mm diameter can easily be inserted into the urethra, providing a sensation you have never experienced before. The Slim Finn measures 15 cm in length and is made from handcrafted polished medical aluminum. This urethral electric stimulation tool is bipolar and requires an electrical stimulation device - such as the Tension Lover or Mystim Pure Vibes - to activate the poles.