Enjoy the rhythmic sensations created by these petite weighted Black Rose Ben Wa Balls from Doc Johnson. Each pair of Blooming Ben Wa Balls is crafted of non-porous silicone, molded into the perfect size and shape to entice powerful orgasms. In addition, Ben Wa Balls excite and strengthen the PC muscles. Silicone Ben Wa Balls. Strengthens PC muscles. 1.1 oz. weight. 2.75 circumference. Perfect for beginners or aficionados.