20 Elegant and useful germanium stones inlaid,reduce pain, fatigue & muscle tension. Lowering blood pressure and stimulate blood circulation etc.</br>Made of solid tungsten metal,scratch resistant and very durable.Free of lead and nickel.</br>Size:Length:inches;Width:inches</br>Come with free box.Saving your giftwrap service fee, and help you store the ring much safer and longer.</br>Life Time Warranty.If you have any question, please feel free to contact us or just post it in the part of "Customer Questions & Answers" below the page, you will get the answer by us or buyers as soon as possible.</br></br>Product Description</br></br><br><b>About Germanium</b> <br> <br> Germanium is a semiconductor element that has a small band gap that allows it to efficiently respond to infrared light. The two important characteristics of Germanium that brings about healthy function effects are its natural ability to emit negative ions and the penetration of Far Infrared Rays into the human body. <br> <br>Germanium has the ability to emit a high percent of Far Infrared Rays that penetrate deep into the human body. When Far Infrared Rays are absorbed into the various organs of the human body, it activates, revitalizes, develops and strengthens them. <br> <br><b>Benefits</b> <br> <br>The combined use of Tungsten with Germanium helps to retain body heat and many other various benefits: <br> <br>(1)Strengthens one's immune system. <br>(2)Stimulate blood circulation;Increases and maintains body warmth <br>(3)Raises oxygen levels <br>(4)Speeds up metabolism of body cells,slows down ageing,prevents bacterial growth <br>(5)Removes harmful toxins <br>(6)Relieves joint and muscle pain,fatigue and tiredness;promotes quality sleep <br>(7)Alleviates physical stress, stiffness, cramps or discomfort <br>(8)Controls swelling <br>(9)Reduces water retention</br><br/>http://www.amazon.com/gp/product/B01J5YTT08