These are the classic and original kegel exercise balls.
I sell 2 different sets of kegel balls and some customers have expressed a concern over not being able to 'fit' them in, so I have now got these in stock. These balls are marble sized and have a heavier, smaller ball inside of them.
Being smaller, it entails more exercise of your muscles to keep them in but is a great alternative to the other 2 I have in stock.
Notice that these balls do not come with string so I'd advise wearing undies when you wear these!
The balls are made from a metal material and come in a lovely box for you to keep them together in one place.