After many requests, we added the Deep Throat Training Category to our product line. This silicone tube is specifically formulated to emulate the male anatomy's surface and internal density. Three levels of arousal state are available: Flaccid, Soft, Semi-Erect, and Erect. The retaining ball that goes inside the mouth is approximately 1.3" in diameter, and the external safety flange is 1.5".
This tube currently has two tip options and three flange options. Also, we are making it standard to come with a 1/4" bore.