This is a set of massage stones, if you are looking for a relax massage with easy way, here, natural energy stones would be a good choice for you. The massage stones are tools of the trade for professional or home spa, relaxing, healing, pain relief. In addition. Enjoy a deeper and longer-lasting sense of relaxation while creating balance and harmony. You deserve itFeatures- Color: Black.Material: Power StoneSize: About 4 x 3 x 1cmEach stones has hole to absorbe care oil, and it will take care of your skin in thr process of massage.Each stone goes through a proprietary treatment process to give you clean, smooth and fully-usable stones.- Just the right smoothness for a perfect glide (not rough or too slippery).Suitable for those who long to use computers, mobile phones or other electromagnetic radiation class equipment.Natural volcanic energy stone contains trace elements needed by human body. Packing list：1x massage stone