Nen Wa Balls Silver. Ben Wa style balls features: silky smooth surface. Perfectly weighted. Four speeds of vibration. Pleasure anytime, any place! Waterproof vibrating exercise, orgasm balls. Phthalates free made using Thermoplastic Rubber TPR. A water based lubricant is recommended. Always clean before and after use. Nen Wa Balls Silver by Nasstoys of New York. The Ultimate Love Toy Company. New image for 2013.