This 5/16" wide copper magnetic bracelet has. This copper bracelet in our line of quality magnetic jewelry has 6 superior 2000 gauss magnets and also emits negative ions through the electrolysis of the copper touching the skin resulting in superior copper ionic therapy and magnetic therapy. Copper bracelets are the strongest treatment for hand (arthritis tendinitis), wrist (arthritis, tendinitis, carpal tunnel), elbow (arthritis, tendinitis) and shoulder (bursitis, tendinitis, frozen shoulder) on the arm they are worn. However they will often help neck, back and knees.