Kink Vibrating Silicone Cock Cage Black. The Caged vibrating silicone cock cage from the Kink by Doc Johnson Collection takes sleeves and rings to another level with a long line design, built in ball strap, and powerful vibrating bullet. A strategic open design along the shaft of the smooth silicone sleeve keeps direct stimulation strong while the snug fit of the cage and ball strap tug and tease the wearer into a raging, rock-hard erection. The bullet vibes one-touch control stimulates both the wearer and partners for an explosive finish.Kink by Doc Johnson is an exciting collaboration with Kink.com to create a collection of high quality authentic fetish items suitable for long term practitioners and new initiates alike. Single speed bullet requires 3 cell batteries, included. Phthalate free, body safe. UPC Code 782421059712. Total length 3 inches, width, diameter 1.5 inches. Materials ABS plastic, Silicone.