Keep your sub's mouth open using this Locking Silicone O-Ring Gag. It features a silicone-wrapped ring that measures approximately 1 1/2" diameter. Use it to watch him drool all over himself or to keep his mouth accessible. The strap is also made of silicone and has a locking buckle. (Lock not included.)
Outer diameter: 2"; inner diameter: 1 1/2".