Crafted with the power to influence, Pro Performance C-Rings are flexible rings created to hug the penis and testicles providing just the right amount of pressure to extend performance and intensify orgasms. The beginner ring is made from a soft, stretchy formula making it easy to put on and just as easy to take off. Worn together or separately, Pro Performance C-Rings provide genuine versatility and strength allowing for prolonged and powerful pleasure. Pro Performance C-Rings can help combat Erectile Dysfunction (ED): The c-rings can be worn around the base of the penis (together or separately) to restrict blood flow and help extend erections. When worn around the testicles, c-rings can help erections last for a longer period and can create a stronger climax. Dimensions: Main Ring Outer Diameter: 2.3 in. Depth: 1.6 in. Inner Diameter: 1.2 in. Tightening Ring Outer Diameter: 2 in. Depth: 0.6 in. Inner Diameter: 0.9 in.