Titanium Sports Tornado Baseball Necklace Multi Colors 18'' 20'' 22'' Germanium: 2.4%, Titanium: 0.25% Length(4 sizes): Approximately 18''/45cm; 20''/50cm; 22''/55cm Width: 1.2 cm Material: silicone, negative ions, nylon, plastic Benefits: 1. Reduces muscle tension and increase flexibility 2. Protects against muscular injury 3. Reduces fatigue thus enhancing the ability to perform at maximum level 4. Improves blood flow & circulation 5. Alleviates discomfort and improves sleep