Ace is made for people with advanced muscle bands. The sphincter muscle is just that- muscle. Use it and it gets stronger and more developed- of course that can make it difficult to find a plug that stays put. With nearly a two inch neck, Ace can hold even the champion of muscle bands. The curves of the plug are gentle and gradual so it doesn't hurt. This plug will last you a lifetime. Diameter: 1.3" Length: 3.3"

Download the Product Info sheet from Tantus: Click Here