Master Series Pyramids Nipple SuckerFeaturing two precision designed glass bulbs in different sizes, this set offers a perfect fit regardless of anatomy. The included four graduated silicone rings are made to hold your desired level of suction in placesimply select a ring, slide it over the base of the pump, and gently squeeze to create a satisfying vacuum. Once the ideal level is achieved, slide the ring down to comfortably maintain the effect. Whether you're looking to enhance