Smooth silicone spheres lightly weighted with free-roaming weights expertly tone and tighten your muscles for increased control and heightened stimulation during play. Combine with water-based lubricant and insert each contoured ball one at a time, enjoying the benefits of the Silicone Ben Wa Balls during and after wear. Key features: - skin-safe super-smooth silicone cover - weighted balls for beginners and intermediate users - contoured for easy insertion - strong and secure retrieval cord - easy-to-clean Size: 17.4 cm Color: Black-Silver Material: Silicone & ABS Plastic