Optimale Easy Grip C Ring Set Slate from Doc Johnson. Optimize your experience. This set of soft, stretchable silicone cock rings in three sizes offers the same mind blowing sensations and rock hard, long lasting erections as our classic design, plus a user friendly upgrade. The tabbed edges of the Optimale Easy Grip C Ring Set make it even easier to place the rings where you want them and remove them when you are done. Features: soft, stretchable Silicone. Three graduated sizes. Tabbed grip edges make wearing and removing easy. Delay ejaculation and prolong erection. Enhance girth. Easy to clean. Top rack dishwasher safe. Phthalate free. Body safe. Specifications: Black. UPC Code 782421064174. Depth .50 inch, .60 inch, .64 inch. Ring inner diameter 1.10 inches, 1.26 inches, 1.40 inches.