Specifications: The stone is made of PP plastic material, high hardness and wear resistance. Easy to use, can move it at any time for both indoor and outdoor use. Foot massage to stimulate reflex zones, promoting metabolism, clear the meridians, qi and blood, adjusting visceral function and enhance immunity. Type: Foot Massage Mat Color: Black Cloth + Colorful Stones Stone Material: PP Plastic Quantity: 1Pc Features: Keep Healthy, Portable, Release Pressure, Durable Size: 35cm x 35cm/13.78" x 13.78" (Approx. ) Notes: The stones have been pre-installed, you can remove and re-assemble them according to your own need. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package includes.