K Balls Smooth are made of pure silky silicone material, decorated with subtle designs for visual delight. The design joins two oval-shaped spheres with a flexible stem, making them into a single waterproof piece that's easier to insert and remove. Inside each sphere, a weighted ball moves freely with each movement of your body, strengthening kegel muscles for better sexual experiences. A built-in retrieval cord at the base enables easy removal when desired. Use only water-based lubricants with this toy. Color: Mauve Type: Ben Wa Balls Material: Silicone Length: 4" Width: 1 1/2" Special Features: Pure Silicone, Waterproof