Medical Grade Silicone Ben Wa Ball Is Hypoallergenic and Hygienic. Also Free of Phlalate?? BPA?? Dioxon & Latex</br>1.2 Inch Diameter Kegel Ball & 2 Balls Ben-Wa Balls Kegel Exercise Duotone Smart Vaginal Massagers</br>100% Waterproof Hygienic because of its seamless silicone. Effortless and easy cleaning due to fully waterproofed product.</br>The Small Weighted Ball Inside Each Kegel Exerciser Provides Biofeedback As You Move. This Subtle Vibrating Reminds You To Flex Your Pelvic Floor Muscles During Activity.</br><br/>http://www.amazon.com/gp/product/B01LGJV0GQ