Optimale C Ring 55mm Black. Optimize your experience. Made of soft, stretchable silicone, this thick and generously sized ring can be stretched around both the shaft and balls at the same time for truly mind blowing sensations and rock hard, long lasting erections, or worn in a single area like smaller c-rings for a more subtle effect. Easy to use, remove, and clean. Product features: delay ejaculation. Maintain long lasting erections.For use around the shaft or testicles. Soft, stretchable Silicone. Extra thick construction. Easy to clean. Top rack dishwasher safe. Phthalate free, body safe. Specifications: ring inner diameter 2.25 inches. Material Silicone. Video. 18.