This cock ring is constructed with velvety silicone material that is firm yet slightly flexible for a snug fit on most shaft sizes. The ridged texturing provides additional stimulation alongside the 5 vibration and 5 shockng functions, which can be enjoyed simultaneously or independently! The interior, dual motors provide stimulation for you and your lover, giving you a good sho.. as you thrust into them. Flip through each combination of stimulating and vibes and see which makes your cock harder. Each premium offering in the Zeus Pro line is rechargeable via an included USB charging cable. Each is constructed with velvety smooth silicone materials that are phthalate-free and latex-free for a body-safe experience. The luxurious silicone materials are compatible with water-based lubricants only. Measurements: Outer diameter 3 inches, inner diameter 1.5 inches, ring thickness 0.75 inches Materials: Silicone and ABS Plastic Color: Black If you have any questions regarding your order or you are not satisfied with your purchase, please contact us before leaving feedback so we may resolve your concern. Thank you for your business.