4 Us Black Vibrating Ring. This unique vibrating cock ring has been specially designed for couples. Slip the thick cock ring around the base of the penis and experience a harder, more prolonged erection. Shaped for dual enjoyment, the vertical clitoral stimulator has been created for pure pleasure and the stretchy ring is perfect for hugging the base of the penis. The powerful protruding Ammunition RO-80mm Vibrating Bullet is designed to stimulate the clitoris no matter what position you are in and also sends vibrations up the shaft of the penis. The Body Safe Silicone material is easy to clean and long lasting, the vibrating bullet can even be removed for solo fun too. Cock ring will stretch from 1.25 inches in diameter to 3 inches in diameter. Worn at the base of the penis the vibrator is positioned vertically, unlike traditional rings providing exquisite stimulation to the clitoral area while making love. The unusual profile of the ring accommodates even the thicker girth. The thicker arms of the ring transmit the vibration all the way to the tip of the penis. 4US is powered by our award winning RO-80MM bullet, batteries included. 100% Waterproof vibrating cock ring. Rocks Off were the first to introduce Platinum cured silicone rubber to the adult market. This grade of silicone is used for long term body implants such as joint replacements and is 100% hypoallergenic. Our silicone is 100% Phthalate Free. Rocks Off original sex toys produced in the United Kingdom.