Diamond red SM O-Ring Gag Open Mouth Gag Loveryoyo Oral Fixation Bondage Restraints for Couple 1. The use of high-quality PU leather and medical grade ABS qualification, safe non-toxic no smell 2. Smooth O-type metal mouth, mouth diameter 4.5cm reasonable size. 3. Can be removable, adjustable size, easy to use easy to clean. 4.Mouth Gag let the one you love can't speak, more can stimulate your desire! 5.Mouth Gag enables you to use comfortable, let you enjoy sex more heaven