MyStim Slim Finn Urethral Sound Long and smooth urethral sound is perfectly suited for the special stimulation of the penis. With some practice its 6 mm can be inserted easily into the urethra, and then create a stimulation like you have never felt before. The Slim Finn is 15 cm long, 6 mm in diameter and crafted from hand polished medical grade aluminum. This e-stim urethral sound is bi-polar and you will require an e-stim device - like our Tension Lover, or the Mystim Pure Vibes - to activate the poles. Please note: This item ( Mystim o(h) Thelo) is an accessory part for the electronic stimulation device to be ordered separately Made in Germany by Mystim Electro Fetish Sex Toys