Satisfyer Yoni Power 1 - Kegel Exercise Balls - RedThe Satisfyer Yoni Power 1 uses a simple, effective logic. As your pelvic floor gets stronger, the ball you use gets smaller. The set includes three balls measuring 3cm, 2. 5cm, and 2cm in diameter, weighing 74g, 46g, and 22g respectively. Starting with the largest gives the muscles something substantial to hold, and moving down through the sizes means progress happens at your own pace. Each ball has a stainless steel core and is covered in smooth,