Her Kegel Kit. Powerful multi-speed stimulator. Perfectly weighted Silicone coated Kegel exerciser with easy retrieval ring. Ergonomically weighted stainless steel balls to tighten and tone Kegel muscles. Non tarnishing, nickel free. Safe and pure for body and pleasure made using phthalate free materials: Silicone balls, Steel with electro plating silver balls, polypropylene PP controller, ABS plastic with silver plating stimulator, PS case. 2 inches by 1 inch stimulator. 1.5 inches Silicone balls. .75 inch steel balls. Requires 2 AAA batteries, not included.