Fangrui Product Details Fangrui Product Details [premium Quality]: The 128hz,256hz,512hz Tuning Fork Set Is Made Of High Quality Aluminum Alloy Material, High Precision, Light In Weight, , Sturdy And And Stainless, Non-magnetic, Superior Performance And Consistent Frequency Accuracy. The Tuning Fork Produce Clear Tones, Longer Vibration Sound And Accurate Tuning. Tuning Forks Can Be Put In The Storage Bag To Avoid Being Other Objects. Please Do Not Leave It In A Damp Place For Too Long Or Keep It Dry And Out Of The Sun Before And After Use. [ Design]: Our Tuning Fork Is Ergonomic And Compact In Design, With A Smooth Extended Handle For Easy Bone Conduction Testing And A Round Tail Design For The Combination Of Beauty And Comfort, And For Carrying Everywhere. [wide Applications]: Each Tuning Fork Produces Specific Frequencies, They Are Suitable For Releasing Stress, Repair Therapy, Relieving Stress Pain, Improving Concentration, Purifying The Body And Mind, Also For Meditation Or Yoga, It Is Needed By Health Professionals, Therap