Silicone O Ring Gag. This firm, 1.5 inch O-ring gag is made from hygienic, non-porous silicone that is easy to clean, taste-free, and fits comfortably in the mouth. The silicone straps that go around the head to hold the gag in place are fully adjustable for comfort. This silicone O-ring gag is an easy to use, attractive alternative to traditional round ball gags. Comfortable and stylish, the silicone o ring gag is great for beginners and more advanced users alike.