Nasstoys Mack Tuff Vibrating Cock Cage Black features: 100% Silicone, 10 functions. Adds ribbed sensations. Couple friendly. Removable bullet vibrator. Waterproof vibrations for play in and out of the water. Body safe. Phthalates free, RoHS compliant materials Cock Cage Silicone, Bullet Vibrator ABS plastic. Cock cage size length 7.25 inches, diameter 1.5 inches, circumference 5 inches. Bullet vibrator size length 2.25 inches. Vibrating cock cage requires 3 AG13 batteries, included.