Pipedream Fetish Fantasy Series Beginner's Open Mouth GagThis sexy o ring gag is made for first timers and features a 1. 75"(4. 4 cm) inside diameter. With the sturdy ring gag held securely between their jaw, your subject won't be able to say a word, while their mouth is propped wide open and easily accessible! The metal ring gag is wrapped in vinyl and secured in place with an adjustable vinyl head strap and metal buckle. Pull the straps tight and your subjects mouth will magically stay open for you to do