Sir Richard's Control Pro Performance Advanced C-Ring Clear. Control has serious benefits. Crafted with the power to influence, Pro Performance Advanced 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. This ring uses a formula that adds the perfect squeeze for most users. Worn together or separately, Pro Performance Advance C-Rings provide genuine versatility and strength allowing for prolonged and powerful pleasure. Pro Performance Advanced 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 is best to place a c-ring on an almost erect penis to allow it to perform properly. Dimensions main ring 2.3 inches in diameter, 1.6 inches depth, 1.2 inches inner diameter. Tightening ring 2 inches diameter, 0.6 inch in depth, 0.9 inch inner diameter. Mix up C-Rings to maximize up your performance! Wear together on shaft. Wear single, double or triple c-rings on the penis to increase erection strength and performance. Use separately on balls and shaft. Wear single or double c-rings on the shaft for added partner pleasure. Wear a single ring around testicles as a ball stretcher, ball squeezer, or to delay and strengthen climaxes.