These fantastic silicone Kegel balls with freely moving balls inside provide incredible stimulation throughout the day while simultaneously tightening and strengthening your vagina. Simply insert the two balls with the silicone tail on the outside. These Kegel balls have smaller weighted balls inside the silicone shells that move with every movement you make, creating a pulsing sensation. This is not only amazing, but your muscles also contract around the balls, allowing you to experience a stimulating vaginal workout like no other.