Silicone Ben Wa Luv Balls are better than ordinary kegel balls
These balls are a blast. When you move with them inserted, the small metal balls inside the larger balls vibrate. This vibration causes a pleasurable sensation as you are stimulated from within. They are very quiet so nobody will know they're inside but you. The balls are made from silicone material. They measure 4" total length (together) and each individual ball is 1" in length and 1.25" wide.