Fetish Fantasy Extreme Silicone O-Ring Gag Black. This Fetish Fantasy Extreme Silicone O-Ring Gag is exactly what you need to keep your sub quiet while keeping their mouth wide open for whatever you wish to put in it! The metal O-ring is encased with medical-grade silicone that is taste-free and gentle on the teeth and gums while remaining sturdy and durable. The belt-like straps, also made of Elite Silicone, easily adjusts to fit most sizes. Package Depth 2.25 inches. Package Width 4.5 inches. Package Height 8 inches. Packaged Weight 4.10 ounces. Features and Functions Silicone, Phthalates Free. Materials: Silicone, Metal.