Explore your wild side with the Nubby Duotone Balls. This pair of weighted duotone balls provide silent self-perpetuating internal vibrations with unique raised nubs for added sensation. Made out of hygienic rubber on a rubber string. They are completely waterproof for fun in and out of the water. Easy to clean and maintain. The balls have an orgasmic 4.75" girth (1.5" diameter) and may be use vaginally or anally.