Her Kegel Kit includes everything you need for kegel exercises. Includes a powerful multi-speed stimulator. A perfectly weighted silicone coasted kegel exercisers with easy retrieval ring. Ergonomically weighted stainless steel balls to tighten and tone Kegel muscles. Non-tarnishing and nickel-free. Requires 2 AAA batteries. Stimulator: 2" X 1". Silicone Balls: 1.5" X 3.75". Steel Balls: .75".