Doc Johnson Novelties Optimale Men's Sexual Health and Wellness line. Packed with intense pleasure for both you and your partner the Vibrating Double C-Ring has two stretchable silicone rings for your shaft and testicles, helping you achieve and maintain long-lasting erections and prolonged ejaculation. For doubly powerful stimulation the dual bullets in textured sleeves target multiple erogenous zones clitoris anus and testicles. The waterproof push-button bullets boast 10 unique functions and are removable for extended playtime. Dimensions Inner Diameter 0.8 inch, inner circumference 2.51 inches, diameter 1.5 inches, inner circumference: 4.71 inches. Total length 3.2 inches. Usable length 2 inches. Width/Diameter 2 inches. Circumference 6.30 inches. Color Black. Video. 18.