Rosy Gold Nouveau Kegel Balls from EDC. The Rosy Gold Ben Wa Balls are smooth metal balls and are suitable for training the pelvic floor muscles. Trained pelvic floor muscles ensure a tighter vagina and more stimulation during penetration. Both balls have the same size and are easy to insert with a small amount of lubricant. They can also be easily removed thanks to the practical pull ring. Clean the Ben Wa Balls with toy cleaner and water after use. 2020 Video.