Geisha Magnetic Balls are easy to use and come in a set of four with varying weights. The set includes two pink balls weighing 27 g (0.95 oz) and two black balls weighing 15 g (0.55 oz). The exercise begins with one black ball on a silicone string, gradually increasing the weight by adding one ball at a time, similar to gym workouts. Users can progress through seven workout levels, ranging from 15 g (0.55 oz) to 84 g (3 oz). Experienced users can train with the balls alone, as they are designed to fit the human anatomy and are made from 100% soft medical silicone, ensuring safety. The balls come with a one-year warranty.