These fantastic silicone kegel balls with free-roaming balls inside will give you amazing stimulation throughout the day and simultaneously work to tighten and strengthen your vagina. Simply insert the two balls with the silicone tail outside of you. These kegel balls have smaller weighted balls inside the silicone sleeves and with every movement you make they will also move and cause knocking sensations. Not only will this feel incredible, but your muscles will contract around the balls, giving you a stimulating vagina workout like no other. Material: Silicone. Weight: Total - 78 grams - each ball is 39 grams . Dimensions: Overall Length - 6.41 inches Insertable - 3.25 inches. Width - 1.30 inches. One Year Manufacturer Warranty.