Three hand blown, solid glass balls in graduated sizes. Ball sizes: 1.75" (4.5 cm), 1.25" (3 cm), 1" (2.5 cm.) Balls are held together by ultra hygienic silicone strap. Soft silicone spikes on strap for extra sensation. Removable silicone strap for thorough cleaning. Glass and silicone become slick when lubricated. Both materials are durable, non-porous and phthalate free. Waterproof.
