Made from premium, phthalate-free, and non-porous silicone, these urethral dilators (sounds) are easy to sterilize and body-safe. They offer an entirely new experience in sounding. The flexible rods bend with the body and slide into the penis for that unique sensation you crave. Each sound has two ends of different thicknesses, allowing you to gradually increase your urethra’s size until it can accommodate the largest rod! Dimensions Length per rod: approx. 20.3 cm Smallest rod: approx. 0.48 cm in diameter at one end and approx. 0.58 cm at the other end Medium rod: approx. 0.69 cm in diameter at one end and approx. 0.81 cm at the other end Largest rod: approx. 0.86 cm in diameter at one end and approx. 0.97 cm at the other end