These Master Series Venus Benwa Balls are ideally designed to keep your playthings internal muscles tight and strong and over time, more sensitive. Benwa balls not only tone and tighten the vaginal muscles, but can stimulate during use, creating a session like no other. Watch your subject as they feel the gentle motions inside, the effort as they tighten to keep them in. The simple, elegant design has been in use for centuries. The versatile nature of the balls offer pleasure and benefits for every experience level, including increased production of lubrication and stronger orgasms. Proportionally weighted and quite comfortable, Venus Benwa Balls give anyone a doorway to the ancient secrets of pleasure.