Try this studly vibrating cock ring on for size! The Colt Vibrating Stud is a stretchy, studded cock ring with removable micro bullet stimulator. Simply push the button on the bullet to jump-start the vibrations! The ring itself is made of soft TPE, while the bullet is made of ABS plastic. Batteries included (2 watch, 4 included). Ring is 1.2" in diameter; bullet is 2" long and .5" in diameter.