Master Series Stainless Steel Venus Ben Wa Balls. These Master Series Venus Ben Wa Balls are ideally designed to keep your playthings internal muscles tight and strong and over time, more sensitive. Ben Wa 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, not only for women but for men as well. The versatile nature of the ball offers anal pleasure and benefits for every experience level too. Proportionally weighted and quite comfortable, Venus Bewa Balls give anyone a doorway to the ancient secrets of pleasure. Measurements 0.75 inch in diameter. Material Stainless steel. Color Silver.