Silicone O-Ring GagKeeps the mouth wide open! This gag is the perfect item for games of pleasure and submission. The ring keeps the submissive's mouth open wide all the time. For deep insights and inserting various things or liquids into the mouth. The ring is covered in silicone to protect the teeth, The head strap is made out of silicone and can be adjusted with the buckle fastener so that it fits any head size. Ring 3. 8 cm. Silicone, metal.