Silver smooth Ben Wa Balls on a string * Perfectly wighted for the beginner * Sturdy cord for easy removal * With your every movement, the weights inside each of these balls roll, working to strengthening your kegel muscles. * Kegel exercise to tone pelvic muscles. * Ball diameter: 1 1/4" * Packaging: sealed vacuum bulk pack. What is Ben Wa Ball? Invented hundreds of years ago yet still popular to this day, Ben Wa Balls have been one of women"s favorite items to use. Now they come in many varieties and variations called Duotone Balls and Kegel Balls. How to use Ben Wa Ball as a Kegel Exerciser? Ben Wa Balls are great for strengthening your pelvic floor muscles. Since the balls are weighted, you have to use your muscles in the vagina to hold them in. With Kegel Balls, you can squeeze on the elastic silicone or increase resistance by tugging on them. Doing these exercises daily will tighten and firm your vagina muscles. Many gynecologists also recommend using kegel exercisers to treat urinary incontinence since stronger pelvic muscles improve bladder control.