Invasion Silicone Urethral Sound Trainer 3 Piece Set

Made of premium, non-porous silicone, these urethral sounds are easy to sterilize and body safe for an all new sounding experience. These flexible rods bend with the body, sliding down the shaft for that unique sensation.

Each sound is double sided, with a different sized girth on each end. The graduated sizes allow you to work your way up until you can accommodate the largest rod. Each sound is 8 inches long. The smallest has a diameter of 0.19 inch on one side and 0.23 inch on the other. The medium is 0.27 inch and 0.32 inch wide. The large is 0.34 inch and 0.38 inch wide.