Product DescriptionWalking around with inserted kegel balls will already bring about pleasure sensations that are unimaginable. Yet these insertable Silicone LuvBalls are one step further. They have little balls on the inside that vibrate when rolled around. They don't use any kind of motor, so no one can hear them rolling around inside. All they might hear is the soft moans coming from you as you enjoy your toys. The outside balls have an attached string for easy removal of the LuvBalls. These insertable LuvBalls add up to a very smart purchase. These balls are made of silicone material. The balls measure 4" total length (together) and each individual ball is 1" in length and 1.25" wide.