This velvety-smooth and completely adjustable silicone Black & White Collection O-ring gag is perfectly designed for comfortable but secure restriction. Stretch and open your sub’s lips for a variety of play options with this beautifully crafted toy! Made from medical-grade and phthalate-free silicone the O-ring is rigid but gentle on the teeth. The leather strap is fully adjustable and has a sturdy metal clasp for secure tightening. This O-ring strap has a total length of 57 cm (22.5in). The inner diameter of the flexible silicone ring measures 4 cm (1.6in).