Satisfyer V Balls 3 Piece Training SetDuo CO3 Balls provide a great feeling object for the pelvic muscles to grip during kegels you'll have to flex to hold 'em in place, and what do you know there's your workout! Satisfyer has provided some illustrated exercise positions for you to try, but you can also simply stand or walk around the room. Identical in shape, sexy silkiness and handy looped retrieval cord, the CO3 balls differ only in weight. The lightest blue version, at 2. 2oz 62. 4g