Round up sensual fun! Your M2M nitrile cock ring is completely skin safe, so you do not have to worry about anything but getting off in the sexiest way possible. Pull on your mega nitrile ring and expect it to snap tightly around your hard cock and balls. Medium ring has a 1.75 inches diameter. They are perfect for use with silicone, oil and water based lubricants. Choose ultimate rigidity and total safety!