Control has serious benefits 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. Key Tip! A c-ring can restrict blood from leaving an erect penis, but it can also inhibit blood from flowing into a penis. So, it's best to place a c-ring on an almost erect penis to allow it to perform properly. Dimensions ? Main Ring 2.3 in. (5.8 cm) (Dia) 1.6 in. (4 cm) (D) 1.2 in. (3 cm) (?Inner Dia) Tightening Ring 2 in. (5.2 cm) (Dia) 0.6 in. (1.5 cm)