The XR Brands Invasion Silicone Urethral Sound Trainer Set is designed for those seeking a safe and effective method for urethral sounding. Made from premium, phthalate-free, and non-porous silicone, these sounds ensure ease of sterilization and body safety. Each sound measures 8 inches in length and features a unique double-sided design with varying diameters. The smallest sound has a diameter of 0.19 inches on one end and 0.23 inches on the other, while the medium and large sizes range from 0.27 inches to 0.34 inches in width, allowing users to gradually work up to the largest size. This flexibility in design allows them to bend with the body for a comfortable fit. The striking blue color adds a visually appealing element to this practical set. Country of origin: China.