Hegar Sounds are now available individually, for those who would like to try just one instead of purchasing a whole set. The Hegar Sound is a urethral dilator with each end a slightly different diameter. The purpose of the sound is to gradually and gently enlarge the urethra using a smooth metal shaft that is inserted into the penis. Urethral play can be an adventurous new facet of your medical fetish or BDSM scene.
Measurements: 8.5 inches long, one end is 12 mm (0.472 inches) in diameter, opposite end is 11 mm (0.433 inches) in diameter
Material: Chrome Plated Brass
The Hegar Sound is the yin, to your yang. You've found what you're looking for.