Mystim Thin Finn Urethral Sound

The Mystim Thin Finn Urethral Sound is a sleek tool designed for advanced urethral play and the unique internal stimulation of the penis. Crafted from medical-grade aluminium and polished by hand, this smooth sound offers a luxurious, body-safe experience for those exploring intimate sensations. With an eight-millimetre diameter, Thin Finn is ideal for practitioners who have developed comfort and technique in urethral sounding.

Because aluminium conducts and retains temperature beautifully, you can warm or cool this sound before use—gently heat it or chill it in the refrigerator to add thrilling temperature play to your sessions. Whether you seek new sensory frontiers or enjoy electrostimulation-compatible materials, Thin Finn delivers precision and quality. Always use ample sterile lubricant, proceed slowly, and prioritise hygiene to ensure safe, pleasurable exploration.

Body-safe, medical-grade silicone. Rinse with warm water and a toy-safe cleaner before and after use. Store separately in the pouch provided.

Ships in plain, unbranded packaging with discreet billing — always. Orders placed before 3pm ET ship the same business day.