The purple strap securely houses two purple weighted marbles at each end, once inserted into the vagina, gently move, knock, and rotate with the natural movement of your body to pleasurably stimulate, tune up and increase circulation to the tissues of your vaginal vault. Material: Silicone. Dimensions: Overall Length - 7.32 inches. Width of each Kegel Ball - 1.30 inches. Length of Silicone strap - 4.73 inches. Weight of the Kegel balls - 30 grams and 50 grams. One Year Manufacturer Warranty.